1.

Heat of combustion of methane is - 800 kJ. What is the heat of combustion for4 xx 10^(-4) kg of methane ?

Answer»

`-800 kJ`
`-3.2xx10^(4) kJ`
`-20kJ`
`-1600 kJ`

SOLUTION :`underset(16g)(CH_(4)+2O^(2) to CO_(2) +2H_(2)O,DeltaH_(C)=-800kJ`
`:'` Heatof COMBUSTION of ` 4xx10^(-4)` kg `CH_(4)` will be
`=-(800x4xx10^(-4))/(16xx10^(-3))`
`=-20 kJ`


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