Question

Two feeds, 5 mole with 25 J/mole and F with 5 J/mole, product contains two streams, 5 mole with 10 J/mole and 10 mole with 15 J/mole, what is the value of F?

(a) 10 mole

(b) 15 mole

(c) 20 mole

(d) 25 mole

The question was posed to me in a national level competition.

My query is from Solving Energy Balance Problems in portion 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

Right choice is (d) 25 mole

For explanation I would say: 5*25 + F*5 = 5*10 + 10*15, => F = 25 mole.