The polymerization of ethylene to linear polyethylene is represented by the reaction $nCH_2=CH_2 \rightarrow (CH_2-CH_2)_n$ where $n$ has a large integral value. Given that $\Delta H_{C=C}$ and $\Delta H_{C-C}$ at 298 K are 590 and 331 kJ/mol. Calculate the enthalpy of polymerization per mol of ethylene.

Question

$\begin {array} {1 1} (A)\;72\: kJ/mol & \quad (B)\;259\: kJ/mol \\ (C)\;-72\: kJ/mol & \quad (D)\;-259 \: kJ/mol \end {array}$