# Problem: Consider the following processes (Treat all gases as ideal). 1. Nitrogen gas is compressed isothermally to one half its original volume. 2. Carbon dioxide is allowed to expand isothermally to 10 times its original volume. 3. A glass of water loses 100 J of energy reversibly at 30°C. 4. The temperature of one mole of helium is increased 25°C at constant pressure. 5. The pressure of one mole of oxygen gas is allowed to double isothermally.   Which of these processes leads to an increase in entropy?   a) 1 and 4         b) 5         c) 3 and 5         d) 2 and 4         e) 1 and 2

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###### Problem Details

Consider the following processes (Treat all gases as ideal).

1. Nitrogen gas is compressed isothermally to one half its original volume.

2. Carbon dioxide is allowed to expand isothermally to 10 times its original volume.

3. A glass of water loses 100 J of energy reversibly at 30°C.

4. The temperature of one mole of helium is increased 25°C at constant pressure.

5. The pressure of one mole of oxygen gas is allowed to double isothermally.

Which of these processes leads to an increase in entropy?

a) 1 and 4         b) 5         c) 3 and 5         d) 2 and 4         e) 1 and 2

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Entropy concept. You can view video lessons to learn Entropy. Or if you need more Entropy practice, you can also practice Entropy practice problems.

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What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Laude's class at TEXAS.