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Heat of combustion of CH(4),C(2)H(4),C(2...

Heat of combustion of `CH_(4),C_(2)H_(4),C_(2)H_(6)` are `-890,-1411` and `-1560 kJ //mol` respectively. Which has the lowest calorific fuel value ?

A

`CH_(4)`

B

`C_(2)H_(4)`

C

`C_(2)H_(6)`

D

Same for all

Text Solution

Verified by Experts

The correct Answer is:
B
Calorific value `=` heat of combustion per `g` of fuel`,i.e., ` for `C_(2)H_(4),` it is `(-1411)/(28)` , the lowest value.
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Knowledge Check

  • Heat of combustion of CH_(4),C_(2)H_(4),C_(2)H_(6) are -890, -1411 and -1560 kJ/mol respectively. Which was the lowest fuel value in kJ/g

    A
    `CH_(4)`
    B
    `C_(2)H_(4)`
    C
    `C_(2)H_(6)`
    D
    All of the above

  • Heats of combustion of CH_(4),C_(2)H_(4), C_(2)H_(6) are -890, -1411 and -1560 kJ/ "mole" respectively. Which has the lowest fuel value in kJ/g ?

    A
    `CH_(4)`
    B
    `C_(2)H_(4)`
    C
    `C_(2)H_(6)`
    D
    all same

  • Heats of combustion of CH_(4),C_(2)H_(6),C_(2)H_(4) and C_(2)H_(2) are -212.8,-373.0,-337.0 and -310.5 kcal respectively at the same temperature. The best fuel among these gases is:

    A
    `CH_(4)`
    B
    `C_(2)H_(6)`
    C
    `C_(2)H_(4)`
    D
    `C_(2)H_(2)`

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    The heats of combustion of Ch_(4) and C_(4)H_(10) are -890.3 and -2878.7 kJ mol^(-1) , respectively. Which of the two has greater efficiency as fuel per gram?

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