Answered: Suppose 1.00 kg of water at 42.5° C is…

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter4: The Second Law Of Thermodynamics

Section: Chapter Questions

Problem 76AP: Suppose 20 g of ice at 0 is added to 300 g of water at 60 . What is the total change in entropy of...

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Suppose 1.00 kg of water at 42.5° C is placed in contact with 1.00 kg of water at 19.5° C.

(a) What is the change in energy (in joules) of the hot water due to the heat transfer when it is placed in contact with the cold water and allowed to reach equilibrium?

(b) What is the change in entropy in joules per kelvin due to this heat transfer?

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The answer to (a) is -ve but (b) isn't correct wether +ive or -ive. I'm not understanding (b).

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