Calculate the H for the following reaction: 2 C( s ) + H 2 ( g ) C 2 H 2 ( g ) Given the following chemical equations and their respective enthalpy...

Calculate the ΔH for the following reaction:

2 C(s) + H2(g) → C2H2(g)

Given the following chemical equations and their respective enthalpy changes:

              C2H2(g) +  O2(g) → 2 CO2(g) + H2O(l)      ΔH = −1299.6 kJ

              C(s) + O2(g) → CO2(g)                                ΔH = −393.5 kJ

              H2(g) +   O2(g) → H2O(l)                         ΔH = −285.8 kJ