Question

If Cp of solid benzene is 10 J/^oC, what is the enthalpy change of water from 5^oC to 75^oC?

(a) 5 J

(b) 10 J

(c) 75 J

(d) 700 J

The question was asked during an interview for a job.

Question is from Phase Transitions in section Introduction to Energy Balances for Processes without Reaction and Calculation of Enthalpy Changes of Basic Chemical Engineering

Answer 1

Right choice is (d) 700 J

To explain: ∆H = 5∫^7510.dT = 700 J.