Equilibrium and Thermodynamics

Practice Questions

AP Chemistry › Equilibrium and Thermodynamics

Questions

8

1

Consider the following gasesous, reversible, exothermic reaction:

$A \rightarrow C + D + E$

What could be done to increase the equilibrium concentration of species C?

2

$NH_{4}NO_{3}(s) \rightleftharpoons N_{2}O(g)+2H_{2}O(g)$

Which of the following is the correct equilibrium expression for the given reaction?

3

For a given chemical reaction, $\Delta G^{o}=-2.5\frac{kJ}{mol}$ . What is the $K_{eq}$ for this reaction at $25^{o}C$ ?

4

Consider the following chemical reaction.

$A_{(g)}\rightleftharpoons B_{(g)}+C_{(g)}$

This reaction is allowed to equilibrate at some volume and pressure.

Which of the following actions will not shift the equilibrium toward the products?

5

If formate is added to a solution of formic acid in water, which of the following changes would occur?

6

A reaction at equilibrium releases 25 Joules of heat energy at $37^{o}C$ . What is the entropy change for this same reaction?

7

$\small Zn \rightarrow Zn^{2+} + 2e^{-}$ $\small \small E^{o} = 0.762 V$
$\small Cu \rightarrow Cu^{2+} + 2e^{-}$ $\small \small E^{o}= -0.340 V$
$\small Zn^{2+} + Cu \rightarrow Zn + Cu^{2+}$

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

8

The reaction $A+3B\rightleftharpoons2C+2D$ is at equilibrium. You have measured the concentration of and to be

What is the equilibrium constant, ?

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