Hess’s Cycle Question 8

B₂H₆ is used as a rocket fuel. Calculate the ΔH_cof B₂H₆if ΔH_fof B₂H₆is -36 kJ mol^-1, ΔH_fof H₂Ois -286 kJ mol^-1and ΔH_fof B₂O₃is -1274 kJ mol^-1

$clockwise = anticlockwise$

${\color{Red} x}+{\color{Blue} (-36)} = {\color{Magenta} 3(-286)+(-1274)}$

$x=-2096kJ$