A natural gas is analyzed and found to consist of 85.5% v/v (volume percent) methane, 8.5% ethane, 2.5% propane, and 3.5% N₂ (noncombustible).

(a) Calculate the higher and lower heating values of this fuel in kJ/mol, using the heats of combustion in Table B.1.

(b) Calculate the lower heating value of the fuel in kJ/kg.

(c) State in your own words the meaning of the quantity calculated in Part (b).