Question

12. Methane, a major component in natural gas, can be used as a fuel in combustion reactions (proposed by oil tycoon T. Boone Pickens in an add campaign this past year).

What is the maximum amount of work (in kJ) that could be supplied by following reaction under the given conditions at 298 K?

CH4 (g) + 2 O2(g) Æ CO2 (g) + 2 H2O (g) where ΔHo rxn = -803 kJ and ΔSo rxn = -4.00 J/K and PCH4 = 0.45 atm, PO2 = 0.32 atm, PCO2 = 1.76 atm, and PH2O = 2.14 atm.

(a) -822 kJ (b) -815 kJ (c) -789 kJ (d) -794 kJ (e) -810 kJ

the answer is C but i cant get it

Answer 1