Which law describes the relationship between pressure and volume of a gas at constant temperature?

The relationship between pressure and volume of a gas at constant temperature is described by Boyle's Law. This law states that for a given mass of gas, when the temperature is held constant, the pressure of the gas is inversely proportional to its volume. This means that if the volume of the gas decreases, the pressure increases, and vice versa, as long as the temperature remains unchanged. This principle can be observed in everyday scenarios, such as when a syringe is pushed in, causing the volume to decrease and the pressure to rise, which can be easily demonstrated.

Charles's Law pertains to the relationship between volume and temperature at constant pressure, while Avogadro's Law relates to the volume of gas and the number of gas molecules at constant temperature and pressure. The Gas Constant Law is a broader consideration of the ideal gas behavior and connects pressure, volume, temperature, and the amount of gas, but it doesn’t specifically focus on just pressure and volume under constant temperature like Boyle's Law does.