Which of the following descriptions accurately describes Boyle's Law?

• A. The pressure of a fixed amount of gas is directly proportional to its temperature at constant volume.
• B. The volume of a fixed amount of gas is directly proportional to its temperature at constant pressure.
• C. The pressure of a fixed amount of gas is inversely proportional to its volume at constant temperature.
• D. The volume of a fixed amount of gas is inversely proportional to its temperature at constant pressure.

Answer: (C)

Verified step by step guidance

1. Recall that Boyle's Law describes the relationship between pressure and volume for a fixed amount of gas at constant temperature.
2. Boyle's Law states that pressure and volume are inversely proportional when temperature and amount of gas are held constant.
3. Mathematically, Boyle's Law can be expressed as \(P \times V = k\), where \(P\) is pressure, \(V\) is volume, and \(k\) is a constant for a given amount of gas at constant temperature.
4. This means if the volume increases, the pressure decreases proportionally, and vice versa, as long as temperature remains unchanged.
5. Review the other options: relationships involving temperature and volume or pressure correspond to other gas laws (Charles's Law or Gay-Lussac's Law), not Boyle's Law.