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The combustion of 10g coke raised to tem...

The combustion of `10g` coke raised to temperature of `1.0kg` water from `10^(@)C` to `50^(@)C`. Calculate the fuel value of cock. `(Sp. ` heat of `H_(2)O=1 cal//g)`.

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The correct Answer is:
4
Heat supplied to heat water `m.s.DeltaT` ltbr. `=10^(3)xx1xx40=40xx10^(30`
Calorific value `=(DeltaH)/(wt. of fuel)`
`=(40xx10^(3))/(10)=4.0xx10^(3) cal=4.0 kcal`
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