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Unit 8:

Gases

TermDefinition
Pressure the amount of force exerted per unit of a surface
Newton th SI unit for force; the force that will increase the speed of a 1 Kg mass by 1 m/s each second that the force applied
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; exactly equivalent to 760 mm Hg
Pascal the SI unit of pressure; equal to force of 1 N exerted over an area of 1 m2
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 gasses is equal to the sum of the partial pressures of the component gases
Boyles Law the law that states that for a fixed amount of gas at a constant temp, 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 temp at which all molecular motion stops
Charle's law the law that states that for a fixed amount of gas at a constant pressure, the volume of the gas increases as the temp of the gas increases and the volume of the gas decreases as the temp of 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 temp
Combined gas law the relationship between the pressure, volume, and temp of a fixed amount of gas
Avogadro's law the law that states the equal volumes of gases at the same temp and pressure contain equal numbers of molecules
Standard molar volume of a gas the volume occupied by one mole of a gas at STP
ideal gas law the law that states that the mathematical relationship of pressure volume, temp, the gas constant, and number of moles of a gas
ideal gas constant the proportionality constant that appears in the equation of state for 1 mol 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
Created by: sz466020
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