Hydrazine used in rocket fuels can be obtained by the reaction of ammonia and hydrogen peroxide according to the following equations
2NH3(g) + H2O2(l) → N2H4(l) + 2H2O(l) (ΔH°reaction = -241kJ/mol)
If ΔH (formation) of NH3, H2O2 and H2O are -46.1, -187.8 and –285.8kJ/mol respectively, ΔH for the decomposition of hydrazine into N2 and H2 is
(a) 50.6 kJ/mol
(b) 241 kJ/mol
(c) -50.6 kJ/mol
(d) 120.5 kJ/mol
