1. Which of the following molecules would have the largest bond dissociation energy?

A) O₂

B) N₂

C) Cl₂

D)  S₂

2.  Which of the following variables does NOT affect the rate of a reaction:

A) temperature

B) size of the reactants

C) concentration of the reactants

D) catalysts

3. Given the following equation for the combustion of methane, what is the change in heat in kcal if you started with 1.55 grams of methane?

CH₄ +2O₂ → CO₂ + 2H₂O ΔH= -213 kcal/mol

A) 5.30 kcal

B) 41.2 kcal

C) - 20.6 kcal

D) 20.6 kcal

4. At a given temperature, in order for a reaction to be favored (spontaneous), the reaction should have a relatively:

A) Small ΔH and a small ΔS

B) Large ΔH and a large ΔS

C) Small ΔH and a large ΔS

D) Large ΔH and a small ΔS

5. Imagine you react zinc with lead(II) nitrate and form lead and zinc(II) nitrate. In the balanced equation for this reaction, what is the coefficient in front of zinc(II) nitrate?

A) 1

B) 2

C) 3

D) 6