1.

Two moles of a triatomic linear gas (neglect vibration degree of freedom) are taken through a reversible processideal starting from A as shown in figure. The volume ratio (V_(B))/(V_(A))=4. If the temperature at A is -73^(@)C, then : Work done by the gas in AB process is : 6.16 kJ 308.3 kJ 9.97 kJ 0 J (ii) Total enthalpy change in both steps is :

Answer»

3000 R
4200 R
2100 R
0

Solution :(i) (C) `w=-P.DeltaV=-nRDeltaT=-2xx8.314xx600`
`=-9.97kJ`
(ii) (b) `DeltaH_("total")=DeltaH_(AB)+DeltaH_(BC)=nC_(p,m)DeltaT+0`
`=2XX(7)/(2)xxRxx(800-200)`
= 4200 R


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