The decomposition of solid ammonium nitrate has and

CHEMISTRY · Single correct · A Level · Chemistry · Thermodynamics · Thermodynamics

Problem

The decomposition of solid ammonium nitrate has ΔH=115 kJ mol−1\Delta H = 115\,\text{kJ mol}^{-1} and ΔS=200 J mol−1 K−1\Delta S = 200\,\text{J mol}^{-1}\,\text{K}^{-1}. Assuming ΔH\Delta H and ΔS\Delta S remain approximately constant with temperature, at which temperature will the reaction first become thermodynamically favored in the forward direction? (a) 860 K860\,\text{K} (b) 575 K575\,\text{K} (c) 1100 K1100\,\text{K} (d) 290 K290\,\text{K}

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