This document discusses phase diagrams and the phase rule through the example of a one-component water system. It defines key terms like phase, component, degree of freedom, and phase rule. It then explains the different areas and curves in the phase diagram of water, including that the liquid-vapor, ice-vapor, and ice-liquid curves represent univariant systems while the areas represent bivariant systems. It also notes the unique properties of the ice-liquid curve and the triple point where ice, liquid water, and vapor coexist in equilibrium.
THE PHASE RULE
phase rule
degree of freedom in mixture
one component system
two component system
pressure temperature diagram sulfur hydrogen
eutectic eutectoid mixture
THE PHASE RULE
phase rule
degree of freedom in mixture
one component system
two component system
pressure temperature diagram sulfur hydrogen
eutectic eutectoid mixture
Infomatica, as it stands today, is a manifestation of our values, toil, and dedication towards imparting knowledge to the pupils of the society. Visit us: http://www.infomaticaacademy.com/
HSAB concept is an initialism for "hard and soft (Lewis) acids and bases". Also known as the Pearson acid-base concept, HSAB is widely used in chemistry for explaining stability of compounds, reaction mechanisms and pathways.
Presentation suitable mainly for Engineering Students
Highlights: Phase Rule Derivation, Cooling curves, Phase Diagram of water, Carbon dioxide, lead-Silver system, zinc-magnesium system and sodium sulphate-water system
Ekeeda Provides Online Engineering Subjects Video Lectures and Tutorials of Mumbai University (MU) Courses. Visit us: https://ekeeda.com/streamdetails/University/Mumbai-University
Infomatica, as it stands today, is a manifestation of our values, toil, and dedication towards imparting knowledge to the pupils of the society. Visit us: http://www.infomaticaacademy.com/
HSAB concept is an initialism for "hard and soft (Lewis) acids and bases". Also known as the Pearson acid-base concept, HSAB is widely used in chemistry for explaining stability of compounds, reaction mechanisms and pathways.
Presentation suitable mainly for Engineering Students
Highlights: Phase Rule Derivation, Cooling curves, Phase Diagram of water, Carbon dioxide, lead-Silver system, zinc-magnesium system and sodium sulphate-water system
Ekeeda Provides Online Engineering Subjects Video Lectures and Tutorials of Mumbai University (MU) Courses. Visit us: https://ekeeda.com/streamdetails/University/Mumbai-University
Phase equilibria: phase, components and degrees of freedom. The phase rule and its
thermodynamic derivation. The phase diagrams of water and sulphur systems, partially
miscible liquid pairs: the phenol and water and nicotine-water systems. Completely
miscible liquid pairs and their separation by fractional distillation. Freeze drying
(lyophilization).
its the ppt about phase rule which is the part of physical and inorganic chemistry in GTU. it explains how the phase rule is applicable in chemical eng.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
2. Topics will be discussed :
Phase
Component
Phase diagram
Degree of Freedom
Phase rule
Phase diagram of a one component system
3. PHASE
A phase is defined as a homogeneous , physically distinct
and mechanically separable portion of a system which is
separated from other such parts of the system by definite
boundary surface . Some examples of some phases are
solid , liquid and vapor phase of a substance.
4. PHASE DIAGRAM
A diagram which illustrates the conditions of
equilibrium between various forms or phases of a
substance is called a phase diagram or equilibrium
diagram .
5. COMPONENTS
The components are defined as the least number of
chemical constituents by means of which the
composition of each phase can be expressed in the
form of an equation .
The water system for example , consists of one
component ; the composition of each of the three
phases ( solid , liquid , vapor ) can be expressed in terms
of the component H2O .
6. In the decomposition of Calcium Carbonate
CaCO3(s) = CaO (s) + CO2 (g)
Here we have three phases , solid CaCO 3 , solid CaO and CO2
gas . The three constituents present in the system are CaCO3 ,
CaO and CO2 . We can use any two constituents as component
to express all the phases present in the system . If we take CaO
and CO2 as component then
Phase Components
CaCO3 (s) = CaO (s) + CO2 (g)
CaO (s) = CaO (s) + 0 CO2 (g)
CO2 (g) = 0 CaO (s) + CO2 (g)
So decomposition of calcium carbonate is a two component
system .
7. Degree of Freedom
It is defined as the least number of variable factors of a
system such as temperature , pressure and
concentration which must be specified so that the
remaining variables are fixed automatically and the
system is completely defined .
System possessing one , two , three etc degrees
of freedom are said to be univariant , bivariant ,
trivariant etc respectively .
8. PHASE RULE
The phase rule was first established by J.W. Gibbs in 1874 .
It’s a general relation between the variance , the number of
components and the number of phases present at
equilibrium . The relation is
F = C – P + 2
Here
F = Variance
C = Number of Components
P = Number of Phases at Equilibrium
Here 2 is for the intensive variable temperature & pressure.
9. ONE COMPONENT SYSTEM
A system which consists of different phases of the same
chemical species at equilibrium is called a one
component system . Some examples of one component
systems are H2O system , CO2 system , S system etc .
10. Phase diagram of a one component
system (Water System)
We are taking water system as a one component system .
H2O being the only chemical constituent , water system is a
one
Fig : Phase diagram of water system
11. component system . Water system is consist of three
phases as solid phase (ice) , liquid phase & vapour phase
. The number of these phases which can exist in
equilibrium at any time depends on the conditions of
temperature and pressure.
The equilibrium diagram is consist of three curves
OA , OB and OC all meeting at the point O . These
curves divide the diagram into three areas AOC , AOB
and BOC .
12. AREAS ( Bivariant system )
Single phases ( ice ,
water , vapour ) are
capable of stable
existence . In the
phase diagram of
water ,
AOC represents the liquid phase
AOB represents the vapour phase
BOC represents the solid phase
13. To define the system completely at any point in these
areas both the temperature and pressure are necessary
( as the ordinate ) . From the phase rule
F = C- P + 2
= 1 – 1 + 2
= 2
Thus the phase areas have two degrees of freedom .
14. CURVES ( Univariant System )
Curve OA : The Vapour Pressure Curve
It represents the equilibrium between liquid water
and vapour at different temperatures . From the phase
rule :
F= C-P+2
= 1-2+2
= 1
The curve has one degree
of freedom . To describe
the system at any time
15. it is necessary to state either temperature or pressure . If
we fix the temperature , the pressure will be fixed
automatically . So the system is univariant .
The upper end of the curve OA is marked by the
critical point A , where the liquid and vapour phase
merge together and result into a homogeneous phase .
The critical temperature of water is +3740 C at 218.5 atm
pressure .
16. Curve OB : The Sublimation Curve
This curve represents the equilibrium between ice
and vapour . The system is univariant along this curve .
For each temperature there
is only one pressure at which
water vapour is in equilibrium
with solid ice . Similarly for
each pressure there is only one
temperature at which both
the phases coexists . The lower end of the curve extends
to absolute zero , -2730 C temperature .
17. Curve OC : The Fusion Curve
This curve represents the equilibrium between ice and
water . It is called the fusion curve of ice or the melting
point curve .
F= C-P+2
= 1-2+2
= 1
The curve has a one
degree of freedom .
18. This curve shows the effect of pressure on melting point
of ice . The curve is slightly inclined towards the pressure
axis . It indicates that the melting point of ice decreases
with increase in pressure . This is because the density
increases as the volume of ice decreases on melting ,
which is exceptional from other substances . That’s why
the curve shows a negative slope .
From Clapeyron equation ,
VT
H
dT
dP
trs
trs
19. When ice melts into water ,
VT
H
dT
dP
fus
fus
= Enthalpy change for fusion
= Temperature
= Change of volume for fusion
Here increases with increase in temperature ,
but volume decreases .
< 0
So the slope becomes negative .
Hfus
T
Vfus
Hfus
iffus VVV
dT
dP
20. Curve OA’ : The Metastable Equilibrium
The curve represents the liquid water and water vapour
at metastable equilibrium . It is sometimes possible to
cool water below it’s freezing point without turning
into solid ice . It is
called the super
cooled water . It’s a
very unstable
condition . In
presence of ice or
any other solid or
by stirring , it
instantly converts
into solid ice .
21. The Point O
The three curves OA , OB and OC meet at point O .
This point is known as the TRIPLE POINT . At this
point the three phases ( solid , liquid and vapour ) of
water system
remain in
equilibrium with
each other .
From the phase
rule :
F = 1-3+2
= 0
22. This means that the point has no degree of freedom ,
the system is INVARIANT . The point has a definite
temperature and pressure which is 0.0098o C ( 273.16 K
) at 4.58 mm pressure . Neither the temperature nor the
pressure can be varied . Any change in temperature or
pressure will destroy the equilibrium among the three
phases .