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Calculate the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume at 27°C? (R = 2 cal `K^(-1) mol^(-1)`)A. 54 calB. - 600 calC. - 300 calD. 27 cal |
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Answer» Correct Answer - C Given `T=27^(@)C=300K` `R=2calK^(-1)mol^(-1)` Reaction for combustion of carbon monoxide is given as: `CO(g)+1/2O_(2)(g)toCO_(2)(g)` `thereforeDeltan_(g)=1-15=-1/2` Now, the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume is given by `DeltaH-DeltaU=Deltan_(g)RT` `thereforeDeltaH-DeltaU=-1/2xx2xx300=-300 cal` |
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