1) Boyle's law states that the volume of a gas is inversely proportional to its pressure when temperature is kept constant. Charles' law describes the direct relationship between volume and temperature of a gas at constant pressure. Gay-Lussac's law explains that pressure of a gas rises with increasing temperature at constant volume. 2) The combined gas law incorporates Boyle's, Charles's and Gay-Lussac's laws to describe the interrelationships between pressure, volume and temperature for a fixed amount of gas. 3) According to Avogadro's law, equal volumes of gases under same conditions of temperature and pressure contain equal numbers of molecules. Dalton's law states that total pressure of a gas mixture is the sum

1. THE GAS LAWS

26. 4. You fill a rigid steel cylinder with a volume of 20.0 L with nitrogen gas to a final pressure of 20 000 kPa at 27 0 C. How many moles of nitrogen gas does the cylinder contain?