# Pressure-volume relation of gas

The above diagram shows the pressure-volume relation of $$n$$ moles of an ideal gas in state $$A$$ and state $$B.$$ Which of the following statements is true?

$$a.$$ The internal energies of $$A$$ and $$B$$ are the same.
$$b.$$ If we change the state of the gas from $$A$$ to $$B$$ as shown in the above diagram, then the temperature of the gas will increase.
$$c.$$ The amount of the heat emitted from the state change $$A \rightarrow B$$ is $$2PV .$$

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