1. The problem statement, all variables and given/known data Hydrazine was used as a fuel for the Messerschmidt 163 rocket fighter in World War II and for the American Gemini and Apollo spacecraft. What is the enthalpy change of atomisation of 1 mol of gaseous hydrazine? A 550 kJ B 1720 kJ C 1970 kJ D 2554 kJ Use of the Data Booklet is relevant to this question 2. Relevant equations 3. The attempt at a solution Is my equation correct? N2(g) + 2H2(g) → N2H4(g) The bond enthalpy for the N2(triple bond) in the data book let is 994. H2 is 436. N-N is 160 and N-H is 390 (if you need other bond enthalpies from the data booklet Il be happy to provide them) I know that one of the ways to find the enthalpy change is Ʃ(bond breaking energy) - Ʃ(bond making energy). So i got 1866-1720= 146J/mol. Which is NOT IN THE OPTION!!