What does Boyle's Law express mathematically?

Boyle's Law, which is foundational in the study of gases in the field of physics and chemistry, states that, at constant temperature, the pressure of a given quantity of gas is inversely proportional to its volume. This relationship is beautifully expressed mathematically as the product of pressure and volume being a constant value for a given amount of gas.

When you see the equation represented as P1V1 = P2V2, it indicates that if the pressure (P) increases, the volume (V) will decrease, and vice versa, provided that the temperature remains unchanged. This direct relationship allows for the calculation of how changes in pressure can impact the volume of a gas, which is a crucial concept in fields like industrial hygiene, where understanding the behavior of gases is important for safety and health assessments.

The other equations listed do not correctly capture the essence of Boyle's Law. They might represent other physical laws or principles but are not applicable to the relationship governed by Boyle's Law concerning pressure and volume at a constant temperature.