1. Calculate the enthalpy change for the reaction C2H4 (g) + H2(g) - C2H6 (g) delta H = ?
given the following delta H values. Water formed in all reactions is in the liquid phase:
a. delta H = -1410.9 kJ mol•C2H4 (g) for the combustion of C2H4 (g)

b. delta H = -1559.7 kJ mol1 C2H6 (g) for the combustion of CzH6 (g)

C. delta H+ = -285.3 kJ mol-1 H2O for the formation of water (1)