AP Chemistry - Thermochemistry and Kinetics

1

For the following cell reaction:

2 Al (s) + 3 Mn2+ (aq) -> 2 Al3+ (aq) + 3 Mn (s)

predict if the cell potential Ecell will be larger, or smaller than Eocell for the following conditions: \[Al3+\] = 1.0 M; \[Mn2+\] = 5.0 M.

2

Which of the following factors will increase the reaction rate of the following reaction, if it is an endothermic, zero order reaction?

$A+B \rightarrow C$

3

1. $\small Zn \rightarrow Zn^{2+} + 2e^{-}$ $\small \small E^{o} = 0.762 V$

2. $\small Cu \rightarrow Cu^{2+} + 2e^{-}$ $\small \small E^{o}= -0.340 V$

3. $\small Zn^{2+} + Cu \rightarrow Zn + Cu^{2+}$

What is $\small \small E_{cell}^{o}$ ? Is reaction 3 spontaneous?

4

Consider the Kinetic Experimental data obtained from reaction X+Y -> Z

Initial \[X\] Initial \[Y} Inital Rate of Formation of Z

Experiment (mol/L) (mol/L) (mol/L*min)

1 0.20 0.10 1.0 * 10-5

2 0.20 0.20 2.0 * 10-5

3 0.40 0.10 2.0 * 10-5

Which of the following statements is true?

5

Which of the following is a classic example of a first-order reaction?

6

Given the following equation (2A+B --> 3C). Which of the following correctly displays the rate of the reaction?

I. -Δ\[A\]/2Δt

II. Δ\[B\]/Δt

III. Δ\[C\]/3Δt

7

Chaning which of the following factors can alter the rate of a zero-order reaction?

8

$O_{_{3}} \rightarrow O_{_{2}} + O$ (slow)

$O + O_{_{3}} \rightarrow 2O_{_{2}}$ (fast)

The mechanism for decomposition of ozone is shown. What is the intermediate of the process?

9

Given the reaction A + B → C. What is the rate law for the following experiment?

\[A\] \[B\] Rate

0.05 0.05 0.0125

0.05 0.1 0.0250

0.1 0.05 0.0125

10

Which of the following factors will increase the reaction rate of the following reaction, if it is an endothermic, zero order reaction?

$A+B \rightarrow C$

Thermochemistry and Kinetics