A block of 185F iron falls into an insulated container which contains 0.8ft ³ of 70F liquid water. At the same time the water is stirred by a blade attached to a 200W motor. After 10 minutes the temperature is stable and is measured: it is 75F. Find

a) the mass of the block of iron

b) the variation in entropy of iron, water and the entire system.

Answer rating: 100% (QA)

To solve this problem we can use the principle of energy conservation to find the mass of the block of iron and then use the definition of entropy to ... View the full answer