Calculate AG, at 340 K for synthesis of ethylene, C2H4(g), given the thermodynamic data below. Is the reaction spontaneous? Substance AH, (kJ/mol) S° (kJ/mol-K) 0.0 +0.0057 C(s) H2(g) C2H4(g) 0.0 +0.1306 +52.3 +0.2195

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