Chapter 3, Problem 3D.1ST

(a)

Interpretation Introduction

Interpretation:

The standard reaction entropy for the chemical reaction given has to be calculated.

Concept Information:

Standard reaction entropy: Difference in molar entropy between the products and the reactants in their standard states is called the standard reaction entropy,

${\text{Δ}}_{\text{r}}{\text{S}}^{\text{o}}\text{=}{\displaystyle \sum _{\text{products}}{\text{νS}}_{\text{m}}{}^{\text{o}}}\text{-}{\displaystyle \sum _{\text{reactants}}{\text{νS}}_{\text{m}}{}^{\text{o}}}$

Where, $\text{ν}$ are the stoichiometric coefficients in the chemical equation.

(b)

Interpretation Introduction

Interpretation:

Change in entropy when $\text{2 mol}$ ${\text{H}}_{\text{2}}$ reacts has to be calculated.

Concept Information:

Standard reaction entropy: Difference in molar entropy between the products and the reactants in their standard states is called the standard reaction entropy,

${\text{Δ}}_{\text{r}}{\text{S}}^{\text{o}}\text{=}{\displaystyle \sum _{\text{products}}{\text{νS}}_{\text{m}}{}^{\text{o}}}\text{-}{\displaystyle \sum _{\text{reactants}}{\text{νS}}_{\text{m}}{}^{\text{o}}}$

Where, $\text{ν}$ are the stoichiometric coefficients in the chemical equation.