Liquidized hydrazine, N2H4, and liquid 1, 1-dimethylhydrazine, N2H2(CH3)2, both react spontaneously with O2 and can be used as rocket fuel. 

Reaction A: N2H4(l) + O2(g) = N2(g) + 2H20(l)

Reaction B: N2H2(CH3)2(l) + 4O2(g) = N2(g) + 4H2O(l) + 2CO2(g)

a. Use the given information to calculate deltaHrxn for reactions A and B. Please show your work.

Compound Standard enthalpy of formation deltaHformation
N2H4(l) 50.6kJ.mol
N2H2(CH3)2(l) 48.9kJ.mol
O2(g) 0kJ/mol
H2O(l) -285.8kJ/mol
CO2(g) -393.5kJ/mol
N2(g) 0kJ/mol

b. If you have 5.00kg of each liquid rocket fuel, which will provide more energy? Show the calculation of energy for each compound.

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