Chapter 16, Problem 101CWP

(a)

Interpretation Introduction

Interpretation: The statements which are true out of the given statements at the given values of temperature and standard enthalpy change for the given reaction are to be determined.

Concept Introduction: The relation between standard free energy change, standard entropy change and standard free energy change is determined by using the formula,

$\Delta G=\Delta H-T\Delta S$

To determine: The authenticity of the statement, “The given reaction is an endothermic reaction”.

(b)

Interpretation Introduction

Interpretation: The statements which are true out of the given statements at the given values of temperature and standard enthalpy change for the given reaction are to be determined.

Concept Introduction: The relation between standard free energy change, standard entropy change and standard free energy change is determined by using the formula,

$\Delta G=\Delta H-T\Delta S$

To determine: The authenticity of the statement, “The $\Delta S^{\circ }$ for the given reaction is negative”.

(c)

Interpretation Introduction

Interpretation: The statements which are true out of the given statements at the given values of temperature and standard enthalpy change for the given reaction are to be determined.

Concept Introduction: The relation between standard free energy change, standard entropy change and standard free energy change is determined by using the formula,

$\Delta G=\Delta H-T\Delta S$

To determine: The authenticity of the statement, “If temperature is increased in the given reaction, the ratio $\frac{{\text{PCl}}_5}{{\text{PCl}}_3}$ will increase”.

(d)

Interpretation Introduction

Interpretation: The statements which are true out of the given statements at the given values of temperature and standard enthalpy change for the given reaction are to be determined.

Concept Introduction: The relation between standard free energy change, standard entropy change and standard free energy change is determined by using the formula,

$\Delta G=\Delta H-T\Delta S$

To determine: The authenticity of the statement, “The $\Delta G^{\circ }$ for the given reaction is negative at all temperatures”.

(e)

Interpretation Introduction

Interpretation: The statements which are true out of the given statements at the given values of temperature and standard enthalpy change for the given reaction are to be determined.

Concept Introduction: The relation between standard free energy change, standard entropy change and standard free energy change is determined by using the formula,

$\Delta G=\Delta H-T\Delta S$

To determine: The authenticity of the statement, “When $\Delta G^{\circ }$ for the given reaction is negative, then $K_{\text{p}}$ is greater than $1.00$”.