1. Chemistry: Matter& Energy Properties & Physical States
Physical vs. Chemical Properties
Solid (s), Liquid (l), Gas (g)
Homogeneous vs. Heterogeneous Mixtures
Organization of atoms/molecules:
atoms/elements -> molecules/compounds
© Copyright R.J. Rusay

2. Physical States of Matter
Solids - Liquids - Gases

3. States of Matter

4. Relative Energy States Molecular Motion
Rank ice, steam and water (liquid) in order of increasing kinetic energy.

5. Organization of Matter

6. Mixtures and Compounds

7. Chemical Symbols Dalton’s Proposal (1800’s)
Write Dalton’s formula for a molecule of water, H2O.

8. Modern Chemical Symbols and Formulas

9. Chemical Symbols and the Periodic Table

10. Physical Properties of a Chemical Family

11. Relative Abundance

12. A Chemical Reaction
Sodium
Chlorine
Sodium chloride

13. Molecular Formulas & Atoms
How many atoms of each element are found in sulfuric acid, H2SO4?
H = ?, S = ?, O = ?
How many atoms of each element are found in TNT, C7H5(NO2 )3?
C = ?, H = ?, N = ?, O = ?
Total N = 3; Total O = 6

14. Chemistry & Matter (Chemicals)
How many different chemicals do you think have been reported in the scientific literature?
A) 100,000
B) 1,000,000
C) 10,000,000
D) 100,000,000
E) 1,000,000,000

15. Conservation: Mass in a reaction must balance
Conservation: Mass in a reaction must balance. (Applies to Energy as well.)
The mass of the hydrogen plus the mass of oxygen that react will equal the mass of water formed.
2 grams of hydrogen combines with 16 grams of water to form 18 grams of water.

16. Energy: (an abstract concept)
Can be thought of as the capacity to do work. (Accelerating / moving a mass over a distance.)
Heat is often referred to as chemical energy is heat.(Joules / Calories)

17. Examples of Two Different Types of Energy
Potential: due to position or composition - which can be converted to work
Kinetic: due to motion of an object
KE = 1/2 mv2
(m = mass, v = velocity)
Name three other types of Energy.

18. Law of Conservation of Energy
Different forms of energy can be inter-converted but can neither be created nor destroyed.
(Euniverse is constant)
Describe three inter-conversions of energy.

19. Inter-conversion of Energy The Gas Combustion Engine

20. Chemistry & Airbags Chemical Properties vs. Physical Properties