P 1 V 1 k displaystyle P_ 1V_ 1k P 2 V 2 k displaystyle P_ 2V_ 2k. Boyles law also called Mariottes law a relation concerning the compression and expansion of a gas at constant temperature. Plots of Boyles Data.
For a gas the relationship between volume and pressure at constant mass.
In other words. Boyles law also referred to as the BoyleMariotte law or Mariottes law especially in France is an experimental gas law that describes how the pressure of a gas tends to increase as the volume of the container decreases. P i V i P f V f where P i initial pressure V i initial volume P f final pressure V f final volume. Boyles Law Definition Boyles law states that the pressure and volume of an ideal gas are directly proportional.