Calculate \( \Delta \mathrm{H}_{\text {reaction }} \) for P \( \fra...

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Calculate \( \Delta \mathrm{H}_{\text {reaction }} \) for
P \( \frac{1}{2} \mathrm{H}_{2}+\frac{1}{2} \mathrm{Cl}_{2} \rightarrow \mathrm{HCl} \)

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When bond dissociation enthalpy of \( \mathrm{H}_{2}, \mathrm{Cl}_{2} \) and \( \mathrm{HCl} \) is given as \( 433 \mathrm{~kJ} / \mathrm{mol}, 243.5 \mathrm{~kJ} / \mathrm{mol} \) and \( +431 \mathrm{~kJ} / \mathrm{mol} \) respectively
(1) \( -244.5 \mathrm{~kJ} / \mathrm{mol} \)
(2) \( 244.5 \mathrm{~kJ} / \mathrm{mol} \)
(3) \( -92.75 \mathrm{~kJ} / \mathrm{mol} \)
(4) \( -93.25 \mathrm{~kJ} / \mathrm{mol} \)
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