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Internal Energy

A gas is cont...

Question

A gas is contained in a metallic cylinder fitted with a pistons. The gas is suddenly compressed by pressing piston downwards and is maintained at this position. After this process, as time passes the pressure of the gas in the cylinder.

A

increases

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B

decreases

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C

remains constant

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D

increases or decreases depending on nature of gas

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Solution

The correct option is B decreases
Sudden $\to$ adiabatic
Volume than becomes constant
but $T_{s y s t e m} > T_{s u r r o u n d i n g}$
$T_{s y s t e m d e c r e a s e s}, P_{d e c r e a s e s}$

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