Question

Which is the correct statement

• A. For an isothermal change PV = constant
• B. In an isothermal process the change in internal energy must be equal to the work done
• C. For an adiabatic change$\frac{P_{2}}{P_{1}} = \left( \frac{V_{2}}{V_{1}} \right)^{\gamma}$, where $\gamma$ is the ratio of specific heats
• D. In an adiabatic process work done must be equal to the heat entering the system

Answer 1

Answer: (A)

For an isothermal change PV = constant

Answer 2

Since $PV = RT$ and $T =$constant; $\therefore\mspace{6mu} PV =$constant.