How to do this Share with your friends Share 0 Anshu Agrawal answered this Solution: when we convert one gram of water into vapour then its internal energy increases and the work done by the water byvolume expansion .so the given latent heat Q for 1 gm of water is 2256 J.this Q contains two part one is chnage in internal energy and one is work done by wateraccording to first law of thermodynamics .Q=W+∆Uwork done W=P∆V=1.013*105*1670*10-6=169.2 Jchange in internal energy ∆U=Q-W=2256-169.2=2086.8 J is the change in internal energy for 1 gm of water. 0 View Full Answer