1.

Twomoles of an idealgas (C_(V) = (5)/(2)R) was compressed adiabaticallyagainstconstantpressure of2 atm . Which wasinitiallyat 350 K and 1 atmpressure. Thework involve in theprocess is equalto.

Answer»

`250 R`
`300 R`
`400 R`
` 500 R`

Solution :`nC_(V)(T_(2)-T_(1)) = - P_(ext) xx nR [(T_(2))/(P_(2))-(T_(1))/(P_(1))]`
`T_(2) = (9)/(7) T_(1) RARR w = 2 xx (5)/(2) xx R [(9)/(7) T_(1)- T_(2)] = 500 R`


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