Boyle,s Law of Perfect Gases

This law was formulated by Robert Boyle in 1662. It states, "The absolute pressure of a given mass of a perfect gas varies inversely as its volume, when the empreature remins constant.:
Mathematically,
                                          pv = Constant

                           The more useful form of the above equation is :
                             P1V1 = P2V2 = P3V3 = ... = Constant
                  here suffixes 1, 2 and 3 ..... refer to different sets of conditions.