In an isothermal process,the volume of an ide | vedclass

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(C) For an isothermal process,the temperature $T$ remains constant. Since the internal energy $U$ of an ideal gas depends only on temperature,the chan

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Work done by the gas is negative

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(C) For an isothermal process,the temperature $T$ remains constant. Since the internal energy $U$ of an ideal gas depends only on temperature,the change in internal energy $dU = 0$.The work done by the gas is given by $dW = P dV$. When the volume is halved,the final volume $V_2 = V_1 / 2$. Therefore,the change in volume $dV = V_2 - V_1 = V_1 / 2 - V_1 = -V_1 / 2$.Since $dV$ is negative,the work done by the gas $dW = P dV$ is negative. This indicates that work is done on the gas.

In an isothermal process,the volume of an ideal gas is halved. One can say that:

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