Chapter 16, Problem 16.130CHP

Interpretation Introduction

Interpretation:

Vapor pressure of water at equilibrium for the reaction given at $\text{35}°\text{C}$ on a hot summer day has to be calculated.

$CoC{l}_{2(s)}+6H_2{O}_{(g)}\stackrel{}{\rightleftharpoons }\left[Co{\left(H_{2}O\right)}_6\right]C{l}_{2(s)}$

Concept Introduction:

Standard free energy change of a reaction is related to equilibrium constant of a reaction involving a gas as,

$\Delta G°=-{\text{ RT ln K}}_p$

Where,

$\begin{array}{l}\Delta G°=\text{ standard free energy change}\\ R=\text{ Universal gas constant}\\ \text{T}=\text{ Temperature}\\ {\text{K}}_p\text{= equilibrium constant}\end{array}$

Standard free energy change of a reaction is also related to standard enthalpy change and entropy change as follows,

$\Delta G°=\Delta H°-T\Delta S°$