The table shows enthalpy of combustion data for several substances: \( C_2H_6 \) is \( -1561 \, kJ \, mol^{-1} \), \( C_2H_4 \) is \( -1411 \, kJ \, mol^{-1} \), \( H_2 \) is \( -286 \, kJ \, mol^{-1} \). Which expression would give the enthalpy for the following reaction: \( C_2H_4(g) + H_2(g) \rightarrow C_2H_6(g) \)?