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Gases 4 Me and Camilla


a device that measures atmospheric pressure

mm Hg

millimeters of mercury


milimeters of mercury, in honor of Torricelli`standard

standard atmosphere

a unit of measurement for pressure equal to 760 mm Hg


the SI unit of measurement for pressure; equal to one newton per square meter

Boyle's Law

The volume of a given sample of gas at constant temperature varies inversely with the pressure

absolute zero

-273 C is the lowest point, when converted to Kelvin, is 0. cannot be lower than this on Kelvin scale

Charles's law

The volume of a given sample of gas at constant pressure is directly proportional to the temperature in kelvins

Avogadro's Law

Equal volumes of gases at the same temperature and pressure contain the same number of particles (atoms or molecules)

universal gas constant

The combined proportionality constant in the ideal gas law

ideal gas law

An equation relation the properties of an ideal gas, expressed as PV=nRT The equation expresses behavior closely approached by real gases at high temperature and/or low pressure

ideal gas

A hypothetical gas that exactly obeys the ideal gas law. A real gas approaches ideal behavior at high temperature and/or low pressure

combined gas law

P1V1/T1 = P2V2/T2. It holds when the amount of gas is held constant.

partial pressure

the independent pressures exerted by different gases in a mixture

Dalton's law of partial pressures

For a mixture og ases in a container, the total pressure exerted is the sum of the pressures that each gas would exert if it were alone

kinetic molecular theory

A model that assumes that an ideal gas is composed of tiny particles (molecules) in constant motion

molar volume

The volume of one mole of an ideal gas; equal to 22.42 liters at standard temperature and pressure

standard temperature and pressure

The condition 0 C and 1 atmosphere of pressure

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