Gas Law's

Temperature

The hotness or coldness of matter as related to the average kinetic energy of the molecules of that substance.

Boyle's Law

The pressure of a gas varies inversely with volume at constant temperature expressed as the equation P1V1 = P2V2.

Charles' Law

The temperature of a gas varies directly with volume at constant pressure expressed as the equation V1/T1 = V2/T2.

Atmospheres

A constant representing the force exerted by the Earth's atmosphere on 1 square meter at sea level.

Barometer

A device used to measure atmospheric pressure.

Ideal Gas

A theoretical gas that perfectly follows the Ideal Gas Law.

Celsius

A unit to measure temperature, where 0º is freezing and 100º is boiling.

Combined Gas Law

Can be used to determine the pressure, volume, or temperature of gases and can be expressed as P1V1/T1 = P2V2/T2.

Avogadro's Principle

Equal volumes of the same gas at the same temperature and pressure contain the same number of molecules.

Pressure

Force per unit area.

Mm Hg

Millimeter of mercury; non-SI unit of pressure approximately equal to 1 Torr or 1/760 atm.

Kelvin

The SI base unit of temperature; represented as the letter K.

Avogadro's Law

The number of moles of a gas varies directly with the volume of a gas at constant temperature and pressure.

Dalton's Law of Partial Pressure

The total pressure of a mixture of gases is the sum of the partial pressures of the gases contained within that mixture.

Molar Volume

The volume occupied by one mole of a substance at a given temperature and pressure.

Standard Temperature and Pressure (STP)

These units are shown as 0º C, or 273 Kelvin (K) for temperature and 1 atmosphere (1 atm), or 760 torr for pressure.

Gay-Lussac's Law

Also known as the pressure law, the pressure of a gas varies directly with the temperature at constant volume; expressed as the equation P1/T1 = P2/T2.

Ideal Gas Law

An equation describing the behavior of a gas in terms of temperature, pressure, volume, and number of moles; expressed as PV = nRT.