The Standard Enthalpy of Reaction $\Delta$ H°_rxn For C₂H₂(g)+ 2 H₂(g) $\rarr$

The standard enthalpy of reaction, $\Delta$ H°_rxn for C₂H₂(g) + 2 H₂(g) $\rarr$ C₂H₆(g) is -311.5 kJ mol^-1. Determine the value of $\Delta$ E°_rxn for this reaction.

A) -306.5 kJ mol^-1
B) -309.0 kJ mol^-1
C) -314.0 kJ mol^-1
D) -316.46 kJ mol^-1
E) +4646 kJ mol^-1