Given the following thermochemical equations,
C2H2(g) + 5/2 O2(g) -----> 2CO2(g) + H2O(l) enthalpy = -1299.5 kJ
C(s) + O2(g) -----> CO2(g) enthalpy = -393.5 kJ
H2(g) + 1/2O2(g) -----> H2O(l) enthalpy = -285.8 kJ
calculate the enthalpy for the reaction below
2C (s) + H2(g) = C2H2 Delta H =