Question

Three feeds, 10 mole with H = 5 J/mole, 10 mole with H = 15 J/mole and 5 mole with 20 J/mole, what is the enthalpy of the products?

(a) 10 J/mole

(b) 12 J/mole

(c) 15 J/mole

(d) 24 J/mole

I got this question during an interview.

I want to ask this question from Solving Energy Balance Problems in section Application of Energy Balances in the Absence of Chemical Reactions and Energy Balances: How to Account for Chemical Reaction of Basic Chemical Engineering

Answer 1

The correct option is (b) 12 J/mole

For explanation I would say: 25*H = 10*5 + 10*15 + 5*20, => H = 12 J/mole.