Hydrazine, N2H4, is a liquid used as a rocket fuel. It reacts with oxygen to yield nitrogen gas and water.
N2H4(liq) + O2(g) → N2(g) + 2 H2O(liq)
The reaction of 3.80 g N2H4 evolves 73.7 kJ of heat. Calculate the enthalpy change per mole of hydrazine combusted.
A.) -8.98 × 10^3 kJ/mol
B.) -280 kJ/mol
C.) -622 kJ/mol
D.) -19.4 kJ/mol