Bond enthalpies

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The gas-phase hydration of ethene,

C_{2} H_{4} (g)

, is represented above. The bond enthalpies for the bonds broken and formed in the reaction are shown below.

$Bond$ ‍	$\begin{aligned} Bond enthalpy \\ (kJ/mol) \end{aligned}$ ‍
$C - H$ ‍	$413$ ‍
$C - C$ ‍	$348$ ‍
$C = C$ ‍	$615$ ‍
$C - O$ ‍	$351$ ‍
$O - H$ ‍	$463$ ‍

Using the information above, determine the value of ${Δ H °}_{r x n}$ ‍ for the hydration reaction.

{kJ/mol}_{r x n}

AP®︎/College Chemistry