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At 25^(@)C, standard enthalpy of combust...

At `25^(@)C`, standard enthalpy of combustion of combustion of hydrogen, cyclohexene `(C_(6)H_(10))` and cyclohexane `(C_(6)H_(12))` are `-241, -3800 and -3920 " kj mol"^(-1)` respectively. Determine the heat of hydrogenation of cyclohexene.

A

`-121 kJ per mol`

B

`+121 kJ per mol`

C

`+242 kJ per mol`

D

`-242 kJ per mol`

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A
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The standard enthalpy of combustion at 25^(@)C of hydrogen, cyclohexene (C_(6)H_(10)) , and cyclohexane (C_(6)H_(12)) are -241,-3800 , and -3920 kJ mol^(-1) repectively. Calculate the heat of hydrogenation of cyclohexene.

The enthalpy of combustion at 25^(@)C of H_(2)(g) , cyclohexane and cyclohexene are -241, 3920 and -3717 kJ "mole"^(-1) respectively. The heat of hydrogenation of cyclohexene is ( Kcal/mole) approximate integer:

DeltaH combustion for CH_(4),C_(2)H_(6) , and C_(3)H_(8) are -210.8,-368.4 and -526.3 kcal mol^(-1) , respectively. Calculate DeltaH combustion for octane.

The heats of combustion of C_(2)H_(4(g)), C_(2)H_(6(g)) and H_(2(g)) are -1405,-1558.3 and -285.6 kJ respectively. Calculate heat of hydrogenation of ethylene.

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