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During isothermal expansion of an ideal ...

During isothermal expansion of an ideal gas its

A

Enthalpy remains constant

B

Enthalpy decreases

C

Internal energy increases.

D

Internal energy decreases.

Text Solution

Verified by Experts

The correct Answer is:
A
During an isothermal expansion of an ideal gas,
`DeltaE=0`, `DeltaT=0`
`H=E+PV` or `DeltaH=DeltaE+Delta(PV)`
or `DeltaH=DeltaE+Delta(nRT)=DeltaE+nRDeltaT`
`DeltaH=0+0=0`
Hence, enthalpy remains constant.
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