Given the following standard molar entropies at 298 ,K: Calculate the standard…

CHEMISTRY · Subjective · A Level · Chemistry · Thermodynamics · Thermodynamics

Problem

Given the following standard molar entropies at 298\,K:

S^{\circ}(\text{N}_2\text{O}_4\,(g)) = 304\;\text{J}\,\text{mol}^{-1}\,\text{K}^{-1}

S^{\circ}(\text{NO}_2\,(g)) = 240\;\text{J}\,\text{mol}^{-1}\,\text{K}^{-1}

Calculate the standard entropy change,

\Delta S^{\circ}

, for the reaction

\text{N}_2\text{O}_4\,(g) \longrightarrow 2\,\text{NO}_2\,(g)

at 298\,K. Report your answer in

\text{J}\,\text{mol}^{-1}\,\text{K}^{-1}

to three significant figures.