Question

A mixture contains 40% of A with Heat Capacity 15 J/^oC and 60% of B with Heat Capacity 10 J/^oC, what is the Heat Capacity of mixture?

(a) 11 J/^oC

(b) 12 J/^oC

(c) 13 J/^oC

(d) 14 J/^oC

The question was posed to me in class test.

I'm obligated to ask this question of 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 answer is (b) 12 J/^oC

Best explanation: Heat capacity of mixture = 0.4*15 + 0.6*10 = 6 + 6 = 12 J/^oC.