Unit mass of liquid of volume V(1) compl...

Unit mass of liquid of volume `V_(1)` completely turns into a gas of volume `V_(2)` at constant atmospheric pressure P and temperature T. The latent heat of vaporization is "L". Then the change in internal energy of the gas is

`L+P(V_(2)-V_(1))`

`L-P(V_(2)-V_(1))`

Zero

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