Calculate the enthalpy change (∆H) of the following reaction2C2H2(g)+5O2(g)⟶4CO2(g)+2H2O(g) given average bond enthalpies of various bonds, i.e., C-H, C ≡C, O = O, C = O, O - H as 414, 814 499,724 and 640 kJ mol-1 respectively.