Consider the Following Processes (Treat All Gases as Ideal)

question 7

Multiple Choice

Consider the following processes (treat all gases as ideal) .
1.The pressure of 1 mol of oxygen gas is allowed to double isothermally.
2.Carbon dioxide is allowed to expand isothermally to 10 times its original volume.
3.The temperature of 1 mol of helium is increased 25C at constant pressure.
4.Nitrogen gas is compressed isothermally to half its original volume.
"5.A glass of water loses 100 J of energy reversibly at 30C.
Which of these processes lead(s) to a decrease in entropy?"

• A)1 and 2
• B)2
• C)3 and 4
• D)1, 4, and 5
• E)1 and 3

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