Entropy values of materials in different states and conditions are investigated. 1/ Under standard conditions (1...

Entropy values of materials in different states and conditions are investigated.

1/ Under standard conditions (1 bar / 0oC), 1 dm3 Helium, which is considered as ideal gas, is heated up to 500 K temperature. a) How much does the entropy value change with isobar heating? b) How much does the entropy value change with Izokor heating?

2/ 1 kg of water whose compressibility is ignored is heated from 0oC to 50oC. a) Calculate the entropy increase of water by heating. b) Compare the previous value with a mixture of 0.5 kg of water at 0oC and 0.5 kg of water at 100oC (final temperature is considered 50oC).

3/ Heat capacity 470 J.kg-1.K-1, a mass with a weight of 1 kg is heated to 300oC and then immersed in 10 kg of water at 20oC. a) Calculate the final temperature. b) After calculating the entropy change of both objects, calculate the total increase.

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Amanda K answered 3 weeks ago

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