Question

3.Calculate the standard enthalpy of formation of C2H4(g) from the following thermochemical equation C2H4(g) + 3O2(g)  2CO2(g) + 2H2O(g); rH=-1323Kj. Given that fH  CO2(g) and H2O(g) are -393.5 and -249 kJ mol-1respectively.​

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