A foundry form box with 25 kg of 200 C hot sand is dropped into a buck – McqOptions

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1.	A foundry form box with 25 kg of 200 C hot sand is dropped into a bucket with 50 L water at 15 C. Assuming there is no heat transfer with the surroundings and no boiling away of water, calculate the net entropy change for the process.
A.	2.37 kJ/K
B.	2.47 kJ/K
C.	2.57 kJ/K
D.	2.67 kJ/K
Answer» D. 2.67 kJ/K

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