Power Notes: Physical vs. Chemical

Today in Science ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Test #2 and Binder Check #2 ,[object Object],[object Object],[object Object]

Identifying Volume There are THREE way to find volume in the chemistry classroom. You will need to know them in order to help you eventually determine the density of various objects . REMEMBER : Volume is the Amount of Space something takes up.

[object Object],[object Object],We can identify substances according to their __________ & ___________ properties

H 2 O Ice water + Heat = H 2 O Liquid water Why do we have to use more than just physical propertie s to determine what a substance is? ,[object Object],Physical Properties ,[object Object],[object Object],[object Object],Examples of Physical Properties Color, size, texture, density, freezing pt. electrical & thermal conductivity, luster, malleability, ductility, hardness, mass, solubility

2 H 2 O + = O 2 H 2 H 2 2 molecules of water electricity 1 molecules of diatomic oxygen 2 molecules of diatomic Hydrogen Different Substances Chemical Properties ,[object Object],[object Object],[object Object],[object Object],[object Object],Examples of Chemical Change Flammability, reacting with acid Oxidation (rusting-reacting w/oxygen), digesting, decomposition

Signs a Chemical Reaction may be occurring: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],What is the difference between endothermic and exothermic? http://antoine.frostburg.edu/chem/senese/101/thermo/faq/exothermic-endothermic-examples.shtml Endo therm ic – Therm (heat) Endo (in) Ex: Cooking and egg, baking bread, photosynthesis Exo therm ic = Therm (heat) Exo (out) Ex: Rusting, Explosions, Fireworks

Physical or Chemical? ,[object Object],[object Object],Remember: http://antoine.frostburg.edu/chem/senese/101/thermo/faq/exothermic-endothermic-examples.shtml The Law of Conservation of Mass – Matter cannot be CREATED or DESTROYED . It can only change form(physical) or become rearranged (chemical – a change in how the atoms - Review Questions Answers in notes Physical or Chemical P or C S or D = SAME substance DIFFERENT substance Extra Credit: Top 10 Amazing Observations – Online activity- each worth 2 pts.

Power Notes: Physical vs. Chemical

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Power Notes: Physical vs. Chemical