Question

What is the heat transferred from the system if the output sensible heat is 10 J, input sensible heat is 15 J, and heat of solution is 20 J?

(a) 10 J

(b) 15 J

(c) 20 J

(d) 25 J

This question was posed to me in an online quiz.

I would like to ask this question from Effects of Mixing into Energy Balance in portion Energy Balances that Include the Effects of Chemical Reaction, Ideal Processes, Efficiency and the Mechanical Energy Balance and Heats of Solution and Mixing of Basic Chemical Engineering

Answer 1

Right answer is (b) 15 J

Easiest explanation: Q = ∆Hout,sensible – ∆Hin,sensible + ∆Hsolution = 10 – 15 + 20 = 15 J.