JEE PHYSICS MCQ: THERMODYNAMICS

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Application +4 | -1

What will be the change in internal energy for

1 \mathrm{~g}

of water when its phase changes from liquid phase to vapour phase? At atmospheric pressure,

1 \mathrm{~g}

of water has a volume

1 \mathrm{~cm}^3

in liquid phase and

1671 \mathrm{~cm}^3

in vapour phase. (Latent heat of water is

2256 \mathrm{~J} / \mathrm{g}

View answer and explanation

Correct option: A

2086.8 J

Option A (2086.8 J) is correct because it is calculated by subtracting the work done during phase change from the latent heat.

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