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The heat of combustion of ethane and ben...

The heat of combustion of ethane and benzene is `-1560` and `-3268" kJ mol"^(-1)` respectively. Which two has higher efficiency as fuel per gram and the amount of heat produced per gram?

A

Benzene, `41.9" kJ g"^(-1)`

B

Ethane, `"52 kJ g"^(-1)`

C

Benzene, `"78 kJ g"^(-1)`

D

Ethane, `"30 kJ g"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
Heat produced by ethane `=(1560)/(30)="52 kJ g"^(-1)`
Heat produced by benzene `=(3268)/(78)="41.9 kJ g"^(-1)`
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Knowledge Check

  • The heats of combustion of C and CO are -393.5 and -283.5 kJ mol^(-1) respectively . The heat of formation (in kJ) of CO per mode is

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    B
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    A
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    B
    `-109`
    C
    `+218`
    D
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