From oil wells the ethane is flamed off in abundance, because it is difficult and un-reactive to use commercially. But would it make a good fuel? The standard enthalpy of reaction for
2C2H6 (g) + 7 O2(g)  → 4 CO2(g) + 6 H2O(l) is -3120kJmol-1
 1. Calculate the standard enthalpy of combustion of ethane?
 2. Calculate the specific enthalpy of combustion of ethane?
 3. Discuss, Is ethane a more or less efficient fuel than methane?