The internal energy of a gas is given by...

The internal energy of a gas is given by `U=2pV`. It expands from `V_0` to `2V_0` against a constant pressure `p_0`. The heat absorbed by the gas in the process is

`2P_0V_0`

`4P_0V_0`

`3P_0V_0`

`P_0V_0`

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