Chapter 18.1, Problem 1PPC

Practice Problem CONCEPTUALIZE

Which equation is correct for calculating for a gaseous reaction that occurs at constant volume?

$\begin{array}{l}A{S}_{sys}=nR\\ \text{ (i)}\end{array}$ $\begin{array}{l}\Delta S_{sys}=nRT\text{ ln}\frac{P_{unltial}}{p_{unal}}\\ \text{ (ii)}\end{array}$ $\begin{array}{l}\Delta S_{sys}=nR\text{ ln}\frac{P_{unltial}}{p_{unal}}\\ \text{ (iii)}\end{array}$ $\begin{array}{l}\Delta S_{sys}=\frac{nR}{T}\text{ ln}\frac{P_{heat}}{p_{unltial}}\\ \left(\text{iv}\right)\end{array}$