Question

A mixture contains 20% of A with Heat Capacity 10 J/^oC and 80% of B with Heat Capacity 5 J/^oC, what is the Heat Capacity of mixture?

(a) 6 J/^oC

(b) 7 J/^oC

(c) 8 J/^oC

(d) 9 J/^oC

This question was posed to me in my homework.

The query is from Heat of Solution, Dissolution and Mixing topic in chapter 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

The correct option is (a) 6 J/^oC

The best I can explain: Heat capacity of mixture = 0.2*10 + 0.8*5 = 2 + 4 = 6 J/^oC.