The document discusses the topic of matter. It defines matter as anything that occupies space and has mass. Matter exists in three main states - solid, liquid, and gas. The state of matter depends on how closely packed the particles are and the strength of attraction between them. Changing temperature or pressure can cause a substance to change states from solid to liquid to gas or vice versa. The document provides examples and characteristics of each state of matter. It also discusses phase changes like melting, boiling, condensation, and sublimation.
This chapter is for class 9 based on CBSE curriculum in which physical nature of matter, its characteristics are discussed along with states of matter, their inconversion, scales of temperature and difference between boiling and evaporation and factors affecting evaporation with inforgraphics and key points.
This will give you a complete idea about this topic " is matter around us pure.
It is the concept from ncert class9 and it is also useful for ntse level 1 exam
Chapter - 5, Acids, Bases and Salts, Science, Class 7Shivam Parmar
I have expertise in making educational and other PPTs. Email me for more PPTs at a very reasonable price that perfectly fits in your budget.
Email: parmarshivam105@gmail.com
Chapter - 5, Acids, Bases and Salts, Science, Class 7
ACIDS
EXAMPLES OF ACIDS
ACIDS - FOUND IN
BASE (ALKALINE)
EXAMPLES OF BASE
BASE - FOUND IN
NEUTRAL SUBSTANCE
INDICATORS
EXAMPLES OF INDICATOR
NATURAL INDICATOR (LITMUS)
TURMERIC (NATURAL INDICATOR)
CHINA ROSE
PHENOLPHTHALEIN INDICATOR
NEUTRALISATION
NEUTRALIZATION IN EVERYDAY LIFE
INDIGESTION
ANT BITE
SOIL TREATMENT
FACTORY WASTES
Every topic of this chapter is well written concisely and visuals will help you in understanding and imagining the practicality of all the topics.
By Shivam Parmar (Entrepreneur)
This chapter is for class 9 based on CBSE curriculum in which physical nature of matter, its characteristics are discussed along with states of matter, their inconversion, scales of temperature and difference between boiling and evaporation and factors affecting evaporation with inforgraphics and key points.
This will give you a complete idea about this topic " is matter around us pure.
It is the concept from ncert class9 and it is also useful for ntse level 1 exam
Chapter - 5, Acids, Bases and Salts, Science, Class 7Shivam Parmar
I have expertise in making educational and other PPTs. Email me for more PPTs at a very reasonable price that perfectly fits in your budget.
Email: parmarshivam105@gmail.com
Chapter - 5, Acids, Bases and Salts, Science, Class 7
ACIDS
EXAMPLES OF ACIDS
ACIDS - FOUND IN
BASE (ALKALINE)
EXAMPLES OF BASE
BASE - FOUND IN
NEUTRAL SUBSTANCE
INDICATORS
EXAMPLES OF INDICATOR
NATURAL INDICATOR (LITMUS)
TURMERIC (NATURAL INDICATOR)
CHINA ROSE
PHENOLPHTHALEIN INDICATOR
NEUTRALISATION
NEUTRALIZATION IN EVERYDAY LIFE
INDIGESTION
ANT BITE
SOIL TREATMENT
FACTORY WASTES
Every topic of this chapter is well written concisely and visuals will help you in understanding and imagining the practicality of all the topics.
By Shivam Parmar (Entrepreneur)
Topics Included
• Introduction
• Metals
→ Physical properties of metals
→ Chemical Properties of metals
• Non-metals
→ Physical properties of non-metals
→ Chemical Properties of metals
• Difference between metals and non-metals
• Reaction with Acids
• Reaction with Bases
Chapter 3.metals and non metals priya jhaPriya Jha
An element is the simplest form of matter that cannot be split into simpler substances or built from simpler substances by any ordinary chemical or physical method. There are 118 elements known to us, out of which 92 are naturally occurring, while the rest have been prepared artificially. Elements are further classified into metals, non-metals, and metalloids based on their properties, which are correlated with their placement in the periodic table.Metals
With the exception of hydrogen, all elements that form positive ions by losing electrons during chemical reactions are called metals. Thus metals are electropositive elements with relatively low ionization energies. They are characterized by bright luster, hardness, ability to resonate sound and are excellent conductors of heat and electricity. Metals are solids under normal conditions except for Mercury.Nonmetals
Elements that tend to gain electrons to form anions during chemical reactions are called non-metals. These are electronegative elements with high ionization energies. They are non-lustrous, brittle and poor conductors of heat and electricity (except graphite). Non-metals can be gases, liquids or solids.Metalloids
Metalloids have properties intermediate between the metals and nonmetals. Metalloids are useful in the semiconductor industry. Metalloids are all solid at room temperature. They can form alloys with other metals. Some metalloids, such as silicon and germanium, can act as electrical conductors under the right conditions, thus they are called semiconductors. Silicon for example appears lustrous, but is not malleable nor ductile (it is brittle - a characteristic of some nonmetals). It is a much poorer conductor of heat and electricity than the metals. The physical properties of metalloids tend to be metallic, but their chemical properties tend to be non-metallic. The oxidation number of an element in this group can range from +5 to -2, depending on the group in which it is located.
Class 7th science chapter 8. Winds, Storms and CyclonesSwayam Khobragade
This ppt file is converted into pdf so if u want to use it you may download it and convert it into ppt so u can use it for expaining the concepts of this chapter...... This ppt contains only the information given in the textbook.. This ppt also have the keywords,exercises and other basic knowledge....
Chapter - 2, Is matter around us pure?, Science, Class 9Shivam Parmar
I have expertise in making educational and other PPTs. Email me for more PPTs at a very reasonable price that perfectly fits in your budget.
Email: parmarshivam105@gmail.com
Chapter - 2, Is matter around us pure?, Science, Class 9
PURE SUBSTANCES
WHAT IS A MIXTURE?
HOMOGENEOUS MIXTURE
HETEROGENEOUS MIXTURE
DIFFERENCE BETWEEN MIXTURES AND COMPOUNDS
SOLUTION
PROPERTIES OF SOLUTION
DIFFERENT TYPES OF SOLUTIONS
CONCENTRATION
SUSPENSION
COLLOIDAL SOLUTION
PROPERTIES OF COLLOIDS
TYNDALL EFFECT
COMPONENTS OF COLLOID
SEPARATING THE COMPONENTS OF A MIXTURE
PHYSICAL CHANGE
CHEMICAL CHANGE
Every topic of this chapter is well written concisely and visuals will help you in understanding and imagining the practicality of all the topics.
By Shivam Parmar (Entrepreneur)
Topics Included:
• Materials
• How materials are made
• What is matter made up of
• Why things are grouped
• Classification and its requirement
• Properties of Materials
Weather, climate and adaptations of animals class-7Ravi Prakash
WEATHER (मौसम),
METEOROLOGY,
TEMPERATURE,
HUMIDITY- आर्द्रता,
RAIN,
PRECIPITATION & WIND,
CLOUDINESS AND WIND,
ATMOSPHERIC PRESSURE,
CLIMATE- (जलवायु),
EFFECT OF SUN IN CHANGING OF CLIMATE
CLIMATE ZONE OF INDIA
Alpine Zone,
Sub-Tropical Zone ,
Tropical Zone,
TROPICAL WET ZONE,
TROPICAL DRY ZONE,
Arid zone,
ADAPTATION OF ANIMALS,
Behavioural adaptation,
Structural adaptation,
THE POLAR REGIONS
POLAR BEARS
ADAPTATIONS OF POLAR BEAR
PENGUINS
ADAPTATIONS OF PENGUINS
POLAR BIRDS
ADAPTATIONS OF SIBERIAN CRANE
THE TROPICAL RAINFORESTS
ARBOREAL ANIMALS,
ADAPTATIONS OF RED EYED FROG,
ADAPTATIONS OF MONKEYS.
ADAPTATIONS OF LION TAILED MACAQUE (BEARD APE),
ADAPTATIONS OF TOUCAN,
ADAPTATIONS OF CAT & LEOPARDS,
ADAPTATIONS OF LIONS AND TIGERS,
THE ELEPHANT
ADAPTATIONS OF THE ELEPHANT
COMBUSTION AND FLAME PPT- SHORT NOTES/CLASS8/SCIENCE/CHEMISTRYRidhima Wahi
This is a PPT on the chapter- Combustion and Flame, of class 8.
The PowerPoint presentation will help you get an outline of the chapter, and also help create short notes (for revision)
I hope that would be something of your benefit. :)
From NCERT CH-1
Contains info about-
-matter
-Evaporation
-Change of states of matter
-Boiling point and melting point
-Latent Heat of Fusion And Vaporisation
-Q and A
Topics Included
• Introduction
• Metals
→ Physical properties of metals
→ Chemical Properties of metals
• Non-metals
→ Physical properties of non-metals
→ Chemical Properties of metals
• Difference between metals and non-metals
• Reaction with Acids
• Reaction with Bases
Chapter 3.metals and non metals priya jhaPriya Jha
An element is the simplest form of matter that cannot be split into simpler substances or built from simpler substances by any ordinary chemical or physical method. There are 118 elements known to us, out of which 92 are naturally occurring, while the rest have been prepared artificially. Elements are further classified into metals, non-metals, and metalloids based on their properties, which are correlated with their placement in the periodic table.Metals
With the exception of hydrogen, all elements that form positive ions by losing electrons during chemical reactions are called metals. Thus metals are electropositive elements with relatively low ionization energies. They are characterized by bright luster, hardness, ability to resonate sound and are excellent conductors of heat and electricity. Metals are solids under normal conditions except for Mercury.Nonmetals
Elements that tend to gain electrons to form anions during chemical reactions are called non-metals. These are electronegative elements with high ionization energies. They are non-lustrous, brittle and poor conductors of heat and electricity (except graphite). Non-metals can be gases, liquids or solids.Metalloids
Metalloids have properties intermediate between the metals and nonmetals. Metalloids are useful in the semiconductor industry. Metalloids are all solid at room temperature. They can form alloys with other metals. Some metalloids, such as silicon and germanium, can act as electrical conductors under the right conditions, thus they are called semiconductors. Silicon for example appears lustrous, but is not malleable nor ductile (it is brittle - a characteristic of some nonmetals). It is a much poorer conductor of heat and electricity than the metals. The physical properties of metalloids tend to be metallic, but their chemical properties tend to be non-metallic. The oxidation number of an element in this group can range from +5 to -2, depending on the group in which it is located.
Class 7th science chapter 8. Winds, Storms and CyclonesSwayam Khobragade
This ppt file is converted into pdf so if u want to use it you may download it and convert it into ppt so u can use it for expaining the concepts of this chapter...... This ppt contains only the information given in the textbook.. This ppt also have the keywords,exercises and other basic knowledge....
Chapter - 2, Is matter around us pure?, Science, Class 9Shivam Parmar
I have expertise in making educational and other PPTs. Email me for more PPTs at a very reasonable price that perfectly fits in your budget.
Email: parmarshivam105@gmail.com
Chapter - 2, Is matter around us pure?, Science, Class 9
PURE SUBSTANCES
WHAT IS A MIXTURE?
HOMOGENEOUS MIXTURE
HETEROGENEOUS MIXTURE
DIFFERENCE BETWEEN MIXTURES AND COMPOUNDS
SOLUTION
PROPERTIES OF SOLUTION
DIFFERENT TYPES OF SOLUTIONS
CONCENTRATION
SUSPENSION
COLLOIDAL SOLUTION
PROPERTIES OF COLLOIDS
TYNDALL EFFECT
COMPONENTS OF COLLOID
SEPARATING THE COMPONENTS OF A MIXTURE
PHYSICAL CHANGE
CHEMICAL CHANGE
Every topic of this chapter is well written concisely and visuals will help you in understanding and imagining the practicality of all the topics.
By Shivam Parmar (Entrepreneur)
Topics Included:
• Materials
• How materials are made
• What is matter made up of
• Why things are grouped
• Classification and its requirement
• Properties of Materials
Weather, climate and adaptations of animals class-7Ravi Prakash
WEATHER (मौसम),
METEOROLOGY,
TEMPERATURE,
HUMIDITY- आर्द्रता,
RAIN,
PRECIPITATION & WIND,
CLOUDINESS AND WIND,
ATMOSPHERIC PRESSURE,
CLIMATE- (जलवायु),
EFFECT OF SUN IN CHANGING OF CLIMATE
CLIMATE ZONE OF INDIA
Alpine Zone,
Sub-Tropical Zone ,
Tropical Zone,
TROPICAL WET ZONE,
TROPICAL DRY ZONE,
Arid zone,
ADAPTATION OF ANIMALS,
Behavioural adaptation,
Structural adaptation,
THE POLAR REGIONS
POLAR BEARS
ADAPTATIONS OF POLAR BEAR
PENGUINS
ADAPTATIONS OF PENGUINS
POLAR BIRDS
ADAPTATIONS OF SIBERIAN CRANE
THE TROPICAL RAINFORESTS
ARBOREAL ANIMALS,
ADAPTATIONS OF RED EYED FROG,
ADAPTATIONS OF MONKEYS.
ADAPTATIONS OF LION TAILED MACAQUE (BEARD APE),
ADAPTATIONS OF TOUCAN,
ADAPTATIONS OF CAT & LEOPARDS,
ADAPTATIONS OF LIONS AND TIGERS,
THE ELEPHANT
ADAPTATIONS OF THE ELEPHANT
COMBUSTION AND FLAME PPT- SHORT NOTES/CLASS8/SCIENCE/CHEMISTRYRidhima Wahi
This is a PPT on the chapter- Combustion and Flame, of class 8.
The PowerPoint presentation will help you get an outline of the chapter, and also help create short notes (for revision)
I hope that would be something of your benefit. :)
From NCERT CH-1
Contains info about-
-matter
-Evaporation
-Change of states of matter
-Boiling point and melting point
-Latent Heat of Fusion And Vaporisation
-Q and A
Matter- Matter is anything which occupies space and has mass is called matter. Air and water, sugar and sand, hydrogen and oxygen etc. Matter is made up of very small tiny particles. Particles of matter have space between them they attract each other.
class 09 ch 1 matter
these are my personal noter made by me i made it using ncert workboook , some youtube videos and my personal knowlege . hope it is helpfull for you
PPT FOR CBSE, ICSE BOARD,
CHAPTER 1: MATTER IN OUR SURROUNDING
MATTER, PROPERTIES OF MATTER, CHARACTERISTICS OF MATTER, DIFFUSION, EVAPORATION, SUBLIMATION, KEY OINTS, NOTES.
EXPERIMENTS: PARTICLES OF MATTER ARE VERY SMALL
PARTICLES OF MATTER ARE ALWAYS MOVING
PARTICLES OF MATTER HAVE SPACE BETWEEN THEM.
POTASSIUM PERMANGANATE EXPERIMENT
this topic is related to grade 9 ncert lesson 1.
metter in our surroundings is the first lesson in grage 9, which is very useful to children to understad this lesson.
Introduction:
RNA interference (RNAi) or Post-Transcriptional Gene Silencing (PTGS) is an important biological process for modulating eukaryotic gene expression.
It is highly conserved process of posttranscriptional gene silencing by which double stranded RNA (dsRNA) causes sequence-specific degradation of mRNA sequences.
dsRNA-induced gene silencing (RNAi) is reported in a wide range of eukaryotes ranging from worms, insects, mammals and plants.
This process mediates resistance to both endogenous parasitic and exogenous pathogenic nucleic acids, and regulates the expression of protein-coding genes.
What are small ncRNAs?
micro RNA (miRNA)
short interfering RNA (siRNA)
Properties of small non-coding RNA:
Involved in silencing mRNA transcripts.
Called “small” because they are usually only about 21-24 nucleotides long.
Synthesized by first cutting up longer precursor sequences (like the 61nt one that Lee discovered).
Silence an mRNA by base pairing with some sequence on the mRNA.
Discovery of siRNA?
The first small RNA:
In 1993 Rosalind Lee (Victor Ambros lab) was studying a non- coding gene in C. elegans, lin-4, that was involved in silencing of another gene, lin-14, at the appropriate time in the
development of the worm C. elegans.
Two small transcripts of lin-4 (22nt and 61nt) were found to be complementary to a sequence in the 3' UTR of lin-14.
Because lin-4 encoded no protein, she deduced that it must be these transcripts that are causing the silencing by RNA-RNA interactions.
Types of RNAi ( non coding RNA)
MiRNA
Length (23-25 nt)
Trans acting
Binds with target MRNA in mismatch
Translation inhibition
Si RNA
Length 21 nt.
Cis acting
Bind with target Mrna in perfect complementary sequence
Piwi-RNA
Length ; 25 to 36 nt.
Expressed in Germ Cells
Regulates trnasposomes activity
MECHANISM OF RNAI:
First the double-stranded RNA teams up with a protein complex named Dicer, which cuts the long RNA into short pieces.
Then another protein complex called RISC (RNA-induced silencing complex) discards one of the two RNA strands.
The RISC-docked, single-stranded RNA then pairs with the homologous mRNA and destroys it.
THE RISC COMPLEX:
RISC is large(>500kD) RNA multi- protein Binding complex which triggers MRNA degradation in response to MRNA
Unwinding of double stranded Si RNA by ATP independent Helicase
Active component of RISC is Ago proteins( ENDONUCLEASE) which cleave target MRNA.
DICER: endonuclease (RNase Family III)
Argonaute: Central Component of the RNA-Induced Silencing Complex (RISC)
One strand of the dsRNA produced by Dicer is retained in the RISC complex in association with Argonaute
ARGONAUTE PROTEIN :
1.PAZ(PIWI/Argonaute/ Zwille)- Recognition of target MRNA
2.PIWI (p-element induced wimpy Testis)- breaks Phosphodiester bond of mRNA.)RNAse H activity.
MiRNA:
The Double-stranded RNAs are naturally produced in eukaryotic cells during development, and they have a key role in regulating gene expression .
Richard's aventures in two entangled wonderlandsRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
This presentation explores a brief idea about the structural and functional attributes of nucleotides, the structure and function of genetic materials along with the impact of UV rays and pH upon them.
Richard's entangled aventures in wonderlandRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
Deep Behavioral Phenotyping in Systems Neuroscience for Functional Atlasing a...Ana Luísa Pinho
Functional Magnetic Resonance Imaging (fMRI) provides means to characterize brain activations in response to behavior. However, cognitive neuroscience has been limited to group-level effects referring to the performance of specific tasks. To obtain the functional profile of elementary cognitive mechanisms, the combination of brain responses to many tasks is required. Yet, to date, both structural atlases and parcellation-based activations do not fully account for cognitive function and still present several limitations. Further, they do not adapt overall to individual characteristics. In this talk, I will give an account of deep-behavioral phenotyping strategies, namely data-driven methods in large task-fMRI datasets, to optimize functional brain-data collection and improve inference of effects-of-interest related to mental processes. Key to this approach is the employment of fast multi-functional paradigms rich on features that can be well parametrized and, consequently, facilitate the creation of psycho-physiological constructs to be modelled with imaging data. Particular emphasis will be given to music stimuli when studying high-order cognitive mechanisms, due to their ecological nature and quality to enable complex behavior compounded by discrete entities. I will also discuss how deep-behavioral phenotyping and individualized models applied to neuroimaging data can better account for the subject-specific organization of domain-general cognitive systems in the human brain. Finally, the accumulation of functional brain signatures brings the possibility to clarify relationships among tasks and create a univocal link between brain systems and mental functions through: (1) the development of ontologies proposing an organization of cognitive processes; and (2) brain-network taxonomies describing functional specialization. To this end, tools to improve commensurability in cognitive science are necessary, such as public repositories, ontology-based platforms and automated meta-analysis tools. I will thus discuss some brain-atlasing resources currently under development, and their applicability in cognitive as well as clinical neuroscience.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
This pdf is about the Schizophrenia.
For more details visit on YouTube; @SELF-EXPLANATORY;
https://www.youtube.com/channel/UCAiarMZDNhe1A3Rnpr_WkzA/videos
Thanks...!
2. What is Matter?
• Everything in the universe is made up of material which
scientists have named MATTER.
• Everything which occupy mass and have space is called
MATTER.
• Ex.., the air we breathe, the food we eat, stones,
clouds, stars, plants and animals, even a small drop of
water or a particle of sand- everything is matter.
• Early Indian philosophers classified matter in the form
of five basic elements- the “Panch Tatva”- air, earth,
fire, sky and water.
• Modern day scientists have evolved two types of
classification of matter based on their physical
properties and chemical nature.
3. Classification of MATTER
• On the basis of physical properties, matter can be classified as Solid,
Liquid and Gas.
• On the basis of chemical nature, matter can be classified as pure
substance and mixture.
• Pure substance may be element or compound.
• Mixture can be homogeneous and heterogeneous.
4. Physical nature of matter
• 1. Matter is made up of particles. 2. How small are these particles of matter?
5. Characteristics of particles of matter
• According to kinetic theory,
1. Particles of matter have spaces between them
interparticle space
2. Particles of matter are continuously moving
kinetic energy, diffusion
3. Particles of matter attract each other
force of attraction
Temperature Diffusion
Temperature Kinetic energy
ex. KMnO4 in cold and hot water.
6. States of matter
• Matter around us exist in three states…
• Solid----Iron, wood, stone, sand, pencil, book, gold, ice etc…
• Liquid----water, milk, petrol, alcohol, oil, juice, cold drink etc…
• Gas----Air, oxygen, helium, nitrogen, CNG, LPG, carbon dioxide etc…
7. Packing of particles and force of
attraction
• Force of attraction
• Interparticle Space
• Rigidity
• Density
• Lattice
8. Definitions
•Solid- is defined as that form of matter
which possesses rigidity, is incompressible
and hence has a definite shape and a definite
volume.
•Liquid- is defined as that form of matter
which possesses fluidity but is almost
incompressible and hence has a definite
volume but no definite shape.
•Gas- is defined as that form of matter which
possesses fluidity but is highly compressible
and hence has neither definite shape nor
definite volume.
9. Properties of Solid State
1. Have definite shape and distinct boundaries
2. Possess rigidity
3. Have Definite volume
4. Not possess diffusion
5. Not compressible
Time to think ?????
1. What about Rubber Band?
2. What about Sugar and salt?
3. What about a Sponge?
10. Properties of Liquid State
• No fixed Shape
• Have definite volume
• Possess fluidity
• Not rigid
• Shows diffusion
• Interparticle space- more compare to solid
• Least compressible
Time to think?
why ice float on water though it has higher
density than water?
11. Types of diffusion in Liquid
1. Solid into liquid
2. Liquid into liquid
3. Gases into liquid
Rate of diffusion
it increase with the temperature
12. Properties of Gaseous State
• No definite shape
• No definite volume (volume of gas is equal
to volume of container)
• Maximum fluidity
• Least rigidity
• Highly compressible (CNG, LPG)
• Low density
• High kinetic energy
• Exert pressure (ex.. balloon)
• Diffuse rapidly
14. Other states of matter
•Plasma is super energetic and super exited
particle in form of ionized gases.
• Ex. Neon bulb(Ne), Fluorescent tube (He)
The sun and the stars glow due to presence of plasma.
15. • Bose-Einstein Condensate
In 1920, Indian physicist Satyendra Nath Bose done
some calculations on the fifth state of matter. Based on these
calculations, Albert Einstein predicted a new state of matter
called Bose-Einstein Condensate. (BEC)
BEC formed when a gas having very low density is cooled
to super low temperature.
17. SCALE OF MEASURING TEMPERATURE
• Celsius Scale
0 ˚C to 100 ˚C
• Fahrenheit scale
˚F=9/5(˚C)+32
• Kelvin Scale
K=273 + ˚C
Solve for this…..
1. Convert 55 ˚C to Kelvin.
2. Convert -176 ˚C to Kelvin.
3. Convert 255 K to ˚C
4. Convert 20 K to ˚C
18. Can Matter Change its State?
• Water can exist in three states of matter–
• solid, as ice,
• liquid, as the familiar water, and
• gas, as water vapour.
• Difference in the 3 states of matter is due to difference in the spaces
in between the constituent particles.
• This interparticle space is inversely proportional to interparticle force
of attraction.
• Change in one of this can lead to change in states of matter.
• Two ways to achieve
By changing the temperature
By changing the pressure.
19. Effect of change of temperature
• 1 (a)Change of state from solid to liquid- Melting
(b)Change of state from liquid to solid- Freezing
• 2 (a)Change of state from liquid to gas- Boiling
(b)Change of state from gaseous to liquid- Condensation
21. Definition of melting point
• The temperature at which a solid melts to become a liquid at atmospheric pressure is
called melting point.
• The process of melting i.e., change of solid states into liquid state is also called fusion.
Latent heat of fusion
The amount of heat energy
required to change 1 kg of a
solid into liquid at
atmospheric pressure at its
melting point is called latent
heat of fusion
23. Definition of freezing point
• The temperature at which a liquid freezes to become a solid at atmospheric
pressure is called freezing point.
• The process of freezing i.e., change of liquid states into solid state is also called
solidification.
• Effect of addition of impurities on the freezing point.
impurities lowers the freezing point of liquids.
ex. 30% of CaCl2 in water freeze at 218 K (? oC) as compared to a solution of
sodium chloride in water freeze at 255 K (? oC) .
24. Questions????????
1. What is the effect of impurities on freezing point?
2. What is latent heat of fusion?
3. Why ice is more effective in cooling than water at same
temperature (00C)?
26. Definition of boiling point
• The temperature at which a liquid starts boiling at atmospheric
pressure is called its boiling point.
• Each pure liquid has a fixed boiling point, for example, pure water has
boiling point of 373 K (1000C).
• Higher the boiling point , stronger the force of attraction.
• Volatile liquids- low boiling point and weak force of attraction
ether -308 K, acetone – 329 K, alcohol -351 K etc…
• Non-volatile liquids- high boiling point and strong force of attraction
glycerol -470 K, glycerine – 488 K etc…
27. Latent heat of vaporization
• Temperature remain constant during boiling…where that heat will go…?
• The amount of heat energy that is required to change 1 Kg of liquid into vapors
at atmospheric pressure at its boiling point is called latent heat of vaporization.
28. Effect of impurities on boiling point of liquid.
• Boiling point of pure liquid is fixed
• But addition of salt or other impurities increase the boiling point of
liquid.
• For example, 60% solution of urea raises the boiling point of water by 0.52 K
Effect of pressure on boiling point of liquid.
• The boiling point of liquid depends on the pressure acting on it.
• It increase , if the pressure is increased, and it decreased if the
pressure is decreased.
• At sea level water boils at 373 K where pressure is 1 atm. But on mountain it
boils at lower temperature where pressure is less than 1 atm. And inside
pressure cooker it boils at higher temperature where pressure is more…..
29. Condensation
• Change of gas to liquid.
• When a gas or vapour cooled by
decreasing the temperature, the
kinetic energy of their constituent
particles decreased.
• Due to that particles start moving
slowly.
• As the temperature further lowered,
the attractive force pull particles close
together and the vapour condenses
i.e. gas or vapour converted to liquid.
30. Sublimation
• Direct conversion of solid into gas.
• Only those substance whose vapour
pressures become equal to atmospheric
pressure before their melting points are
capable of undergoing sublimation.
• Dry ice sublime at -780C (195 K).
• Examples:- ammonium chloride,
camphor, naphthalene, anthracene,
benzoic acid, iodine etc…
31. Experiment
• Take some camphor or ammonium
chloride. Crush it and put it in a china
dish.
• Put an inverted funnel over the china
dish.
• Put a cotton plug on the stem of the
funnel, as shown in Fig.
• Now, heat slowly and observe.
• What do you infer from the above
activity?
32. Application of sublimation
• Useful in purification of solids which
sublime on heating and contain non-
volatile impurities.
• In very cold place, snow doesn’t melt
but sublime directly to vapour
• In frost-free refrigerators, ice on the
walls of the freezer sublimes when
warm air is circulated through the
compartment during the defrost
cycle.
33. Effect of pressure
• To convert gas into liquid and liquid into sold, interparticle space
should be decreased and interparticle force of attraction should be
increased.
• Two ways to achieve,
a. by applying pressure
b. by increasing temperature.
34. By applying pressure
• Take a certain volume of gas in
cylinder provided with piston.
• Now compress the gas by pushing the
piston.
• Consequently, interparticle space
decreased, and the gas particles come
so close together that they start
attracting one another strongly to
form liquid.
• In other words, the gas liquefied by
application of pressure.
• Ex. LPG – Liquefied Petroleum Gas.
35.
36. By lowering temperature
• If we cool the gas, the kinetic energy decreases and the particles slow
down.
• As a result, interparticle distance decrease and interparticle force of
attraction increase which pull the gas particles close to form a liquid.
• Gases like ammonia, Sulphur dioxide, carbon dioxide, etc. can be
liquefied easily either by applying pressure at room temperature or by
cooling at atmospheric pressure.
• If carbon dioxide is cooled under high pressure, it can be directly
converted into solid carbon dioxide called dry ice.
• If pressure is decreased to one atmosphere, it sublimes, i.e. it directly
converted to gas.
• Why it is called dry?
38. Evaporation- a surface phenomenon
• “ The phenomenon of change of liquid into vapors at any temperature
below its boiling point is called evaporation.”
Particles of
liquid move
constantly
Leads to
collision
Due to that,
particles move
with different
speed
Thus they have
different kinetic
energy
At any given
temperature,
Kinetic energy
of some particle
on surface is so
high to break
force of
attraction
Due to that
liquid
particle leave
the liquid
And
converted
into vapor
39. Factors affecting evaporation
1. Surface area- greater the surface area, more the evaporation.
2. Temperature- more the temperature, more will be evaporation. So
in summer, evaporation is high than in winter
3. Humidity- water vapor present in air. More the humidity, lesser the
evaporation. That is why, clothes get dried easily in summer than in
winter.
4. Speed of wind- more the speed, more will be the evaporation. So in
windy day clothes get dried faster than in normal day.
5. Nature of liquid- lesser is the boiling point, more is the tendency of
the liquid to evaporate. Force attraction will be less in liquid with
low boiling point so that they easily get evaporate.
40. Evaporation cause cooling
• Liquid particle having high kinetic energy leave the surface and get
converted into vapor.
• As a result, the kinetic energy of the remaining particles of liquid
decreases and hence the temperature falls.
• Thus evaporation cause cooling.
41. Examples
1. Sprinkling of water on the roof or open ground in summer
2. Pouring of acetone on palm.
3. Why do we wear cotton clothes in summer?
4. Perspiration keeps our body cold.
5. Why is ice rubbed on a burnt part of the skin?
6. Why surgeons often spray some ether on skin before performing
minor surgery?
42. Difference between evaporation and boiling
BOILING EVAPORATION
It takes place at particular
temperature when liquid is
heated.
It occurs at any temperature.
Boiling is bulk phenomenon Evaporation is surface
phenomenon
No cooling caused during boiling Evaporation always causes cooling