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The enthalpy of combustion at 25^(@)C of...

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:

A

34.45 kg

B

80.38 kg

C

22 kg

D

224 kg

Text Solution

Verified by Experts

The correct Answer is:
B
(b) `q=mxxcxxDeltaT,m=q//(cxxDeltaT)`
`=(24xx10^(6)xx0.7)//(4.18xx50)`
`=80383gor80.383kg`
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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.

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