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Chapter 3: Matter and Energy

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by

Greg Evans

on 1 September 2013

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Transcript of Chapter 3: Matter and Energy

Ch. 3 - Matter and Energy
photo credit Nasa / Goddard Space Flight Center / Reto Stöckli
Matter is any material that has mass and occupies space
3.1 Classification of Matter
Pure
Substances
Elements
Compounds
Water
Sulfuric Acid
Hydrogen peroxide
Cu
Nitrogen
Helium
composed of one type of substance
combination of two or more elements
Mixtures
Homogeneous
Heterogeneous
Oil & Water
Bubbles in Soda
Chocolate Chip Cookies
Air
Bronze
Salt Water
two or more substances physically mixed but not chemically combined
composition is uniform throughout
components are not uniform throughout
3.2 Properties of Matter
Physical Properties
Shape
Physical State
Color
can be observed or measured w/o affecting the identity of the substance
States of Matter
Solid
Liquid
Gas
definite shape & volume
definite volume but not definite shape
no definite shape or volume
Chemical Properties
Wood burning
Iron rusting
Sugar caramelizing
describe the ability of a substance to change into a new substance
3.3 Temperature
ability to do work or to supply heat
3.4 Energy
Potential
Kinetic
Definition
Example
Gasoline
Riding a bike
stored energy
energy of motion
Types of Energy
Heat
Joule
calorie (cal)
More info on energy
energy that flows from a warmer object to a cooler one
SI unit or work and energy
heating one cup of tea takes about 75 kJ
energy required to raise the temperature of 1 gram of water by 1 degree Celsius
1 cal = 4.184 J
the amount of heat required to raise the temperature of exactly 1 gram of a substance by exactly 1 degree Celsius, this temperature change is written as
3 5 Specific Heat
T
Formula for specific heat
heat (q)
J (or cal)
g x C
o
grams x change in temp
Full transcript