Chapter 16, Problem 83QAP

Interpretation Introduction

(a)

Interpretation:

The value of $\Delta G^o$ at $25{}^{\circ }\text{C}$ needs to be determined.

Concept introduction:

The value of $\Delta G^{\circ }$ can be calculated from equilibrium constant as follows:

$\Delta G^{\circ }=-RT\mathrm{lnK}$

Here, R is Universal gas constant, T is temperature and K is equilibrium constant.

Interpretation Introduction

(b)

Interpretation:

The direction for the reaction needs to be determined.

Concept introduction:

If two or more reactions are coupled, the value of $\Delta G$ for the coupled reaction will be sum of the $\Delta G$ values of all the reactions involved in coupling.

For a spontaneous reaction, the value of $\Delta G$ for the reaction is negative.

Interpretation Introduction

(c)

Interpretation:

For the given concentration of species, the value of $\Delta G$ needs to be determined.

Concept introduction:

The value of $\Delta G$ is related to $\Delta G^{\circ }$ as follows:

$\Delta G=\Delta G^{\circ }+RT\ln Q$

Here, R is Universal gas constant, T is temperature and Q is reaction quotient.