If enthalpies of formation of \( \mathrm{C}_{2} \mathrm{H}_{4}(\mat...

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If enthalpies of formation of \( \mathrm{C}_{2} \mathrm{H}_{4}(\mathrm{~g}), \mathrm{CO}_{2}(\mathrm{~g}) \) and
\( \mathrm{H}_{2} \mathrm{O}_{(\mathrm{l})} \) at \( 25^{\circ} \mathrm{C} \) and \( 1 \mathrm{~atm} \) pressure are \( 52,-394 \) and
\( -286 \mathrm{~kJ} / \mathrm{mol} \) respectively, the change in ethalpy of combustion is
(a) \( -141.2 \mathrm{~kJ} / \mathrm{mol} \)
(b) \( -1412 \mathrm{~kJ} / \mathrm{mol} \)
(c) \( +14.2 \mathrm{~kJ} / \mathrm{mol} \)
(d) \( +1412 \mathrm{~kJ} / \mathrm{mol} \)
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