First slide

Different type of processes

Question

Pressure Vs density graph of an ideal gas is shown in figure

Moderate

A

During the process AB work done by the gas is +ve
B

During the process AB work done by the gas is -ve
C

During the process BC internal energy of the gas is increasing
D

During the process BC internal energy of the gas is constant

Solution

$\begin{array}{l} P = ρRT \\ In the process AB : density is constant . Hence, volume is constant. \\ ∴ work is zero. \\ In the process BC: P \propto ρ \propto \frac{1}{V} \\ obeys Boyle's law, isothermal process. Internal energy constant. \end{array}$

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