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Questions  >>  JEEMAIN and NEET  >>  Physics  >>  Class11  >>  Thermodynamics
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A sample of gas is compressed by an average pressure of $0.5\: atm$ so as to decrease its volume from $400 \: cm^3$ to $200\: cm^3$ . During the process $8\: J$ of heat flows out to surroundings. Calculate the change in internal energy of the system

$\begin {array} {1 1} (A)\;-8 \: J & \quad (B)\;-2.13\: J \\ (C)\;2.13 \: J & \quad (D)\;18.13 \: J \end {array}$

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