At constant pressure and 25°C, what is ArH° for the following reaction
2C2H6(g) +702(g) → 4CO2(g) + H20(1)
if the complete consumption of 89.4 g of C2H6 liberates -4638 kJ of heat energy?
A.-3120 kJ/mol-rxn
B.-1560 kJ/mol-rxn
C.-27600 kJ/mol-rxn
D.-13800 kJ/mol-rxn
E.-787 kJ/mol-rxn