Which two variables are directly related in Boyle's Law?

• A. Pressure and volume
• B. Pressure and temperature
• C. Temperature and volume
• D. Volume and amount of gas (moles)

Answer: (A)

Verified step by step guidance

1. Recall that Boyle's Law describes the relationship between pressure and volume of a gas when temperature and amount of gas are held constant.
2. Boyle's Law states that pressure (P) and volume (V) are inversely proportional, meaning as one increases, the other decreases, but their product remains constant.
3. Mathematically, Boyle's Law is expressed as \(P \times V = k\), where \(k\) is a constant for a given amount of gas at constant temperature.
4. Since pressure and volume are inversely related, they are directly connected through this equation, unlike temperature or amount of gas which are held constant in Boyle's Law.
5. Therefore, the two variables directly related in Boyle's Law are pressure and volume.