Hess’s Cycle Question 5

2-methylpropan-1-ol can also be converted to produce jet and diesel fuel. The first step is the preparation of 2-methylpropene as seen in the following equation:

$C_4H_1_0O_{(l)}\rightarrow C_4H_8_{(g)}+H_2O_{(g)}$

If ΔH_fof C₄H₁₀O is -335 kJ mol^-1, ΔH_fof C₄H₈ is -17 kJ mol^-1and ΔH_fof H₂O is -242 kJ mol^-1 find the ΔH of the reaction of the conversion of 2-methylpropan-1-ol into 2-methylpropene.

$clockwise = anticlockwise$

${\color{Red} x}+{\color{Magenta} -335} = {\color{blue} -17+(-242)}$

$x=74kJ$