For irreversible expansion of an ideal gas under isothermal condition, the correct option is [2021]

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Solution

Q.
For irreversible expansion of an ideal gas under isothermal condition, the correct option is [2021]

1 $Δ U \neq 0, Δ S_{total} = 0$

2 $Δ U = 0, Δ S_{total} = 0$

3 $Δ U \neq 0, Δ S_{total} \neq 0$

4 $Δ U = 0, Δ S_{total} \neq 0$

Ans.
(4)

For reversible and irreversible expansion for an ideal gas under isothermal condition, $Δ U = 0$ , but $Δ S_{total}$ i.e., $Δ S_{sys} + Δ S_{surr}$ is not zero for irreversible process.

Solution

Q. For irreversible expansion of an ideal gas under isothermal condition, the correct option is [2021]

1 ΔU≠0,ΔStotal=0

2 ΔU=0,ΔStotal=0

3 ΔU≠0,ΔStotal≠0

4 ΔU=0,ΔStotal≠0

Ans. (4) For reversible and irreversible expansion for an ideal gas under isothermal condition, ΔU=0, but ΔStotal i.e., ΔSsys+ΔSsurr is not zero for irreversible process.

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Q.
For irreversible expansion of an ideal gas under isothermal condition, the correct option is [2021]

1 $Δ U \neq 0, Δ S_{total} = 0$

2 $Δ U = 0, Δ S_{total} = 0$

3 $Δ U \neq 0, Δ S_{total} \neq 0$

4 $Δ U = 0, Δ S_{total} \neq 0$

Ans.
(4)

For reversible and irreversible expansion for an ideal gas under isothermal condition, $Δ U = 0$ , but $Δ S_{total}$ i.e., $Δ S_{sys} + Δ S_{surr}$ is not zero for irreversible process.