Single Choice

Which is the correct statement

AFor an isothermal change PV = constant
Correct Answer
BIn an isothermal process the change in internal energy must be equal to the work done
CFor an adiabatic change $$\dfrac{P_{2}}{P_{1}} = \left ( \dfrac{V_{2}}{V_{1}} \right )^{\gamma }$$ where $$\gamma $$ is the ratio of specific heats
DIn an adiabatic process work done must be equal to the heat entering the system

Solution

From the ideal gas equation,
Since PV = RT and T = constant: PV constant .

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