# NEET Physics Thermodynamics Questions Solved

Unit mass of a liquid with volume V1 is completely changed into a gas of volume V2 at a constant external pressure P and temperature T. If the latent heat of evaporation for the given mass is L, then the increase in the internal energy of the system is -

(1) Zero

(2) $P\left({V}_{2}-{V}_{1}\right)$

(3) $L-P\left({V}_{2}-{V}_{1}\right)$

(4) L

Concept Videos :-

#16 | Internal Energy (U) of Gas
#17 | Solved Example: 5
#18 | Solved Example: 6
#31 | First Law
#32 | Application of First Law to Adiabatic Process
#33 | Application of First Law to IsoThermal Process
#34 | Solved Example: 14
#35 | Application of First Law to Isochoric & Cyclic Processes
#36 | Solved Example: 15
#37 | Differential Form of First Law

Concept Questions :-

First law of thermodynamics