At Constant Pressure,the Combustion of 20

At constant pressure,the combustion of 20.0 g of C₂H₆(g) releases 1036 kJ of heat.What is ΔH for the reaction given below?
2C₂H₆(g) + 7O₂(g) → 4CO₂(g) + 6H₂O(l)

A) -173 kJ mol^-1
B) -779 kJ mol^-1
C) -1560 kJ mol^-1
D) -3115 kJ mol^-1