1.

Give R= 8.314 JK^(-1) mol^(-1) the work done duringcombustion of 0.090 kg of ethane(molar mass=30) at 300 K is

Answer»

`-18.7 KJ`
`18.7 kJ`
`6.234 kJ`
`-6.234 kJ`

Solution :Sincecombustion takes PLACEAT contantpressure hence `DeltaH=3W`
`DeltaH= n C_(P)DT`
`rarr 3W =(0.090)/(30)xx5/2xx8.314xx300`
`=18.7 kJ`


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