Spontaneous Chemical Reaction:

1
Spontaneous Chemical Reaction

• a reaction that proceeds on its own without
  outside intervention.

2
Entropy (S)

• the disorder of substances in a chemical
  reaction
• ?SSproducts- Sreactants

3
Entropy (S)

• Larger S values have greater disorder
• Solids have smallest entropy
• Gases have largest

4
Spontaneous reactions

• are those that go to lower energy (H) and / or
  higher disorder (S).

5
Gibbs Free Energy (G)

• total energy available
• ?G ?H -T ?S
• spontaneous if -?G

6
Assignment

• Six weeks review in place of midterm

7
7

• The heat required to raise the temperature of 1
  gram of a sample (no specified size) of a
  substance by 1C is called .