24. If enthalpies of formation for C2H4(g), CO2 (g) andH2 O(/)at 25 ° – InterviewSolution

1.	24. If enthalpies of formation for C2H4(g), CO2 (g) andH2 O(/)at 25 °C and I atm pressure be 52, -394 and -286kJ mol respectively, enthalpy of combustion of C2H4(g)will be:(a) +141.2 kJ mol(c) 141.2 kJ mol(CBSE 1995)(b) +1412 kJ mol-1(d) -1412 kJ mol-1
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