Answer to Question #44400 in Other Chemistry for khaled

Question #44400
1. Calculate the standard enthalpy change for the reaction: C2H4(g) + H2(g)→C2H6(g) given that the enthalpy of combustion for the reactants and products are: ∆Hºc(C2H4)(g) = -1411 kJ mol^-1∆Hºc(C2H6)(g) = -1560 kJ mol^-1∆Hºc(H2)(g) = -286 kJ mol-1. 2. Calculate the enthalpy change of combustion for ethene gas (C2H4) given the following enthalpy changes of formation: ∆Hºf(C2H4)(g) = +52 kJ mol^-1∆Hºf(CO2)(g) = -394 kJ mol^-1 ∆Hºf(H2O)(g) = -286 kJ mol^-1 3.Calculate the standard entr opy change for the reaction: N2+ 3H2→2NH3 given the standard entropies Sº(N2)(g) = 191.6 J K^-1 mol^-1 Sº(H2)(g) = 130.6 J K^-1 mol^-1 Sº(NH3)(g) = 193.3 J K^-1 mol^-1
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