Boyle's and Charles' Laws

The outcomes of certain experiments with gases at relatively low pressure lead Robert Boyle to formulate a familiar law. It defines that:

The pressure of a gas expanding at constant temperature differs inversely to the volume, or

(P₁ )(V₁ ) = (P₂ )(V₂ ) = (P₃ )(V₃ ) = constant.

The outcome of Charles's experimentation also concluded that:

The pressure of a gas differs directly with temperature whenever the volume is held constant, and the volume differs directly with temperature whenever the pressure is held constant, or