Question

A 25 kg aluminium ingot (initially at 72 °C), and a 50 kg fireclay brick (initially at 68 °C)) are lowered into a large water reservoir at 16 °C. Both the aluminium ingot and fireclay brick reach the same temperature as the water, due to heat transfer between the blocks and the reservoir water. (a) Determine the total entropy change for this process. (b) With the aid of a diagram, briefly discuss the reversibility/irreversibility of all the heat transfer processes in terms of the prediction of the entropy calculation.

Answer 1