# From the given data, calculate the enthalpy of combustion of cyclopropane at $298 \: K$. The enthalpy of formation of $CO_2(g), H_2O(l)$ and propene(g) are $-393.5, -285.8$ and $20.42 \: kJ/mol$ respectively. The enthalpy of isomerisation of cyclopropane to propene is $-33 \: kJ/mol$

$\begin {array} {1 1} (A)\; 2037.9\: kJ & \quad (B)\;-2091.32 \: kJ \\ (C)\;2091.32 \: kJ & \quad (D)\;- 2037.9 \: kJ \end {array}$

$C(s) + O_2(g) \rightarrow CO_2(g); \Delta H_1 = -393.5\: kJ$