Boyle's law of the gas, and "k" is a constant. The equation states that the product of pressure and volume is a constant for a given mass of confined gas and this holds as long as the temperature is constant. For comparing the same substance under two different sets of conditions, the law can be usefully expressed as The equation shows that, as volume increases, the pressure of the gas decreases in proportion. Similarly, as volume decreases, the pressure of the gas increases. The law was named after chemist and physicist Robert Boyle, who published the original law in 1662. This relationship
Gay-Lussac's law Stanislao Cannizzaro was able to convince the First International Chemical Congress in 1860. This law is often referred to as Gay-Lussac's law of pressure–temperature, between 1800 and 1802, discovered the relationship between the pressure and temperature of a fixed mass of gas kept at a constant volume. Gay Lussac discovered this while building an "air thermometer". The pressure of a gas of fixed mass and fixed volume is directly proportional to the gas's absolute temperature. If a gas's temperature increases, then so does its pressure if the mass and volume of the gas are held constant. The law has a