Answer: Three moles of an ideal gas undergo a reversible

Chapter 20, Problem 27E

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QUESTION:

Problem 27E

Three moles of an ideal gas undergo a reversible isothermal compression at 20.0o C. During this compression, 1850 J of work is done on the gas. What is the change of entropy of the gas?

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QUESTION:

Problem 27E

Three moles of an ideal gas undergo a reversible isothermal compression at 20.0o C. During this compression, 1850 J of work is done on the gas. What is the change of entropy of the gas?

ANSWER:

Solution to 27E

Step 1

For an isothermal expansion, △T=0, and △U=0. Therefore,

 △U=△Q-△W

 0=△Q-△W

 △Q=△W……………………………………………………………………………(1)

Work done on the gas= 1850 J

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