The enthalpy of combustion of \( \mathrm{H}_{2} \), cyclohexene \( \left(\mathrm{C}_{6} \mathrm{....

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The enthalpy of combustion of \( \mathrm{H}_{2} \), cyclohexene
P
\( \left(\mathrm{C}_{6} \mathrm{H}_{10}\right) \) and cyclohexane \( \left(\mathrm{C}_{6} \mathrm{H}_{12}\right) \) are \( -241,-3800 \) and \( -3920 \mathrm{~kJ} \) per mol respectively. Heat of hydrogenation of cyclohexene is:
(1) \( -121 \mathrm{~kJ} \) per mol
(2) \( +121 \mathrm{~kJ} \) per mol
(3) \( +242 \mathrm{~kJ} \) per mol
(4) \( -242 \mathrm{~kJ} \) per mol


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