For the endothermic reaction

CHEMISTRY · Single correct · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

For the endothermic reaction X⇌YX \rightleftharpoons Y, ΔH∘=55.0 kJ mol−1\Delta H^\circ = 55.0\,\text{kJ mol}^{-1} and ΔS∘=125 J mol−1 K−1\Delta S^\circ = 125\,\text{J mol}^{-1}\,\text{K}^{-1}. What is the equilibrium constant KK at 450 K450\,\text{K}? (R=8.314 J mol−1 K−1R = 8.314\,\text{J mol}^{-1}\,\text{K}^{-1}) (a) ≈2.2\approx 2.2 (b) ≈1.4\approx 1.4 (c) ≈0.72\approx 0.72 (d) ≈16\approx 16

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