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unit 8 : Gases
Term | Definition |
---|---|
pressure | the amount of force exerted per unit area of a surface |
newton | the SI unit for force |
barometer | an instrument that measures atmospheric pressure |
Millimeters of Mercury | a unit of pressure |
Atmosphere of Pressure | the pressure of Earth's atmosphere at sea level |
Pascal | the SI unite of pressure |
Partial Pressure | the pressure of each gas in a mixture |
Dalton's law of partial pressure | the law that states that the total pressure of a mixture of gases is equal to the sum of partial pressures of the component gases |
Boyles Law | the law that states that for a fixed amount of gas at a constant temperature, the volume of the gas increases as the pressure of the gas decreases and the volume of the gas decreases as the pressure of the gas increases |
Absolute Zero | the temperature at which all molecular motion stop ( 0 K on the Kelvin scale or - 273.16 on the Celsius scale) |
Charle's law | the law that states that for a fixed amount of gas at a constant pressure, the volume of the gas increase as the temperature of the gas increases and the volume of the gas decreases as the temperature of the gas decreases |
Gay-Lussac's law | The law that states that the volume occupied by a gas at a constant pressure is directly proportional to the absolute temperature |
Combined gas law | the relationship between the pressure, volume, and temperature of a fixed amount of gas |
Avogadro's law | the law that states that equal volume of gases at the same temperature and pressure contain equal numbers of molecules |
Standard molar volume of a gas | the volume occupied by one mole of a gas at STP ( found to be 22.414 10 L ) |
ideal gas law | the law that states the mathematical relationship of pressure(P)Volume(V),temperature(T),the gas constant(R) and the number of moles of gas (n) |
ideal gas constant | the proportionality constant that appears in the equation of state for 1mol of an ideal gas |
Graham's law of effusion | the law that states that the rate of effusion of a gas is inversely proportional to the square root of the gas's density |