Question

150 J is the latent heat for vaporization of water, what is the heat of transition from 50^oC water to 100^oC steam if heat of transition from 50^oC water to 100^oC water is 12 J?

(a) 12 J

(b) 152 J

(c) 162 J

(d) 200 J

The question was posed to me by my college professor while I was bunking the class.

My question is taken from Phase Transitions topic in portion Introduction to Energy Balances for Processes without Reaction and Calculation of Enthalpy Changes of Basic Chemical Engineering

Answer 1

Correct option is (c) 162 J

For explanation I would say: H = 150 + 12 = 162 J.