A 30-kg iron block and a 40-kg copper block, both initially at 808C, are dropped into a large lake at 158C. 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.
The given data is as follows.
= 30 kg, = 40 kg
Now, we will calculate the heat energy as follows.
= 877.5 kJ
= 1003.6 kJ
= 6.531 kJ/K
= -2.747 kJ/K
= -3.142 kJ/K
Now, we will calculate the total entropy as follows.
= 6.531 kJ/K - 2.747 kJ/K - 3.142 kJ/K
= 0.64 kJ/K
thus, we can conclude that the total entropy change for this process is 0.64 kJ/K.
answer: h+ its less than oh
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