Q: A gas tank holds 50 L of oxygen (O2) at the pressure of 18 atm. How many litters will the gas occupy if the pressure is changed to 1.5 atm at a constant temperature?

Flexi Says: It has been found experimentally that the volume of the gas is inversely proportional to the pressure applied to the gas when the temperature is kept constant. This relationship is known as Boyle’s Law. Boyle’s Law can also be written PV=constant at constant T. Mathematically Boyle's law equation is: P₁V₁ = P₂V₂ when temperature is kept constant.