Reaction X has and

CHEMISTRY · Subjective · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

Reaction X has ΔH∘=+50 kJ\Delta H^\circ = +50\,\text{kJ} and ΔS∘=+200 J mol−1 K−1\Delta S^\circ = +200\,\text{J mol}^{-1}\,\text{K}^{-1}. Reaction Y has ΔG∘=−70 kJ\Delta G^\circ = -70\,\text{kJ} and is nearly temperature-independent in the range considered. The two reactions are coupled. Predict whether increasing temperature will make the combined process more favorable, less favorable, or leave its spontaneity unchanged. Briefly justify your answer.

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