1.

For isothermal expansion of an ideal gas, the correct combination of thermodynamic parameters will be

Answer»

`DeltaU = 0, Q = 0, w ne 0 and DeltaH ne 0`
`DeltaU ne 0 q ne 0, w ne 0 and DeltaH = 0`
`DeltaU = 0, q ne 0, w = 0 and DeltaH ne 0`
`DeltaU = 0 , q ne 0, w ne 0 and DeltaH = 0`

SOLUTION :For ISOTHERMAL process, `DeltaT = 0`
`DeltaU = nC_(V)DeltaT = 0`
`DeltaH = nC_(p)DeltaT = 0`
ACCORDING to first law of thermodynamics
`DeltaU = q + w`
Since `DeltaU = 0, q ne w ne 0`.


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