A 30-kg iron block and a 40-kg copper block, both initially at 150oC, are dropped into a large lake at 15oC. Thermal equilibrium is established after a while as a result of heat transfer between the blocks and the lake water. Determine the total entropy change for this process.
Answer:the entropy change for the process is 8.736kj/k
Explanation: the first step is to get the entropy change for iron, copper and that of lake as well. To get further explanation please see attached a solved copy of the problem
