Gas variables are volumes and very low densities. Pressure, temperature, volume, and number of moles define gaseous system.
Charle’s Law – the volume of gas at constant pressure is directly proportional to absolute temperature.
Boyle’s Law – The volume of gas at constant temperature is inversely proportional to the pressure.
Dalton’s Law – The total pressure in a gas mixture is the sum of the partial pressure of the individual components.
Graham’s Law – the rate of effusion for two gases are inversely proportional to the square roots of their molar masses at the same temperature and pressure.
Attractive forces and temperature are some causes that condense gas. The attractive in forces affects the boiling point, volatility, and surface tension of a liquid. Something with high volatility has high vapor pressure at low temperature.
