Q. The latent heat of vaporization of water is 2240 J. If the work done in the process of vaporization of 1 g is 168 J, then increase in internal energy is
A) 2072 J
B) 1904 J
C) 2408 J
D) 2240 J
Explanation
(a) As $dQ = dU + dW$
$\therefore\ \ dU = dQ - dW = 2240 - 168$
= 2072 J
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.