Molar heat capacities at constant pressure for A, B and C are 3, 1.5 and 2 J/K mol. The enthalpy of reaction and entropy of reaction, A + B `rarr` 3C are 20 kJ/mol and 20 J/K mol at 300 K. Calculate `DeltaG` (in kJ / mol) for the reaction, `(1)/(2)A+Brarr(3)/(2)C`
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