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In an isothermal process at 300 K, 1 mol...

In an isothermal process at 300 K, 1 mole of an ideal gas expands from a pressure 100 atm against an external pressure of 50 atm. Then total entropy change `("Cal K"^(-1))` in the process is -

A

`+0.39`

B

`-0.39`

C

`+1.59`

D

`-1.59`

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A
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