Chapter 16, Problem 16.126CHP

Interpretation Introduction

Interpretation:

The temperature at which bromine have vapor pressure of $227\text{ mmHg}$ has to be calculated.

Concept Introduction:

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

$\Delta G°=-\text{ RT ln K}$

Where,

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

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

$\Delta G°=\Delta H°-T\Delta S°$

$\Delta S°$ refers to standard entropy of the reaction which is termed as entropy change in a reaction under standard conditions of $298K$ and $1\text{ atm}$ pressure.  It is represented as,

$\Delta S°=S°\left(products\right)-S°\left(reac\tan ts\right)$