Solved: Explain why each of the following processes is an

Chapter 20, Problem 17DQ

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QUESTION:

Explain why each of the following processes is an example of increasing disorder or randomness: mixing hot and cold water; free expansion of a gas; irreversible heat flow; developing heat by mechanical friction. Are entropy increases involved in all of these? Why or why not?

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QUESTION:

Explain why each of the following processes is an example of increasing disorder or randomness: mixing hot and cold water; free expansion of a gas; irreversible heat flow; developing heat by mechanical friction. Are entropy increases involved in all of these? Why or why not?

ANSWER:

Solution 17 DQ

Step 1:

The examples given here all the increase the entropy as they cause disorder or randomness

Consider

Case 1:

Mixing hot water and cold water

When we mix water which are different temperatures, there is exchange of heat, heat flows from hot water to cold water

Hence the change in entropy will be

        

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