For the reaction at

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

Problem

For the reaction

\mathrm{N_2O_4(g)\;\rightarrow\;2\,NO_2(g)}

298\,\text{K}

, the standard entropy change is

\Delta S^{\circ}_{\text{rxn}} = 86.0\;\text{J\,mol}^{-1}\,\text{K}^{-1}

. The standard molar entropy of

\mathrm{NO_2(g)}

at this temperature is

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

. Determine the standard molar entropy of

\mathrm{N_2O_4(g)}

298\,\text{K}