Consider the following reactions and their standard free energy changes at 298 K: (1)…

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

Problem

Consider the following reactions and their standard free energy changes at 298 K: (1) A(g) ⇌ B(g)

\Delta G^{\circ}_{1} = +8.0\,\text{kJ mol}^{-1}

(2) B(g) ⇌ C(g)

\Delta G^{\circ}_{2} = -5.0\,\text{kJ mol}^{-1}

Calculate the standard free energy change,

\Delta G^{\circ}

, for the overall reaction 2 A(g) ⇌ 2 C(g) at 298 K.