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Among the substances that react with oxygen and that have been considered as potential rocket fuels are diborane [B2H6(g), which produces B2O3(s) and H2O(g)], methane [CH4(g), which produces CO2(g) and H2O(g)], and hydrazine [N2H4(l), which produces N2(g) and H2O(g)].
On the basis of the heat released by 3.84 kg of each substance in its reaction with oxygen, and assuming that thermal energy is the most desirable property in rocket designs, evaluate the possibility of each being used as a rocket fuel. (Hint: Use the Supplemental Data to compute ΔHorxn in kJ/mol, and qsurr in MJ for each fuel. Enter unrounded values.)
diborane
ΔHorxn
kJ/mol
qsurr
MJ
methane
ΔHorxn
kJ/mol
qsurr
MJ
hydrazine
ΔHorxn
kJ/mol
qsurr
MJ
