1.

A diatomic ideal gas initiallyat273 K is given100 cal heatdue to whichsystemdid 209 J work. Molar heatcapacity(C_(m))n of gasfor the process is :

Answer»

`(3)/(2) R`
`(5)/(2) R`
`(5)/(4)R`
5 R

Solution :`DeltaU = 100 -(209)/(4.18) = 50cal rArr DeltaU = nC_(V)dT rArrC_(v,m) = (5)/(2)R rArrndT = (20)/(R) rArr q = nC_(m) dT`
`C_(m)= (100R)/(20) R`


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