The reaction has

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

Problem

The reaction

\mathrm{2\,NO(g) \rightarrow N_2(g)+O_2(g)}

has

\Delta S^{\circ}_{298}=-146\;\text{J\,mol}^{-1}\,\text{K}^{-1}

. Calculate

\Delta S^{\circ}_{298}

for the reaction

\mathrm{NO(g) \rightarrow \dfrac12\,N_2(g)+\dfrac12\,O_2(g)}