a device that measures atmospheric pressure
millimeters of mercury
milimeters of mercury, in honor of Torricelli`standard
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
The volume of a given sample of gas at constant temperature varies inversely with the pressure
-273 C is the lowest point, when converted to Kelvin, is 0. cannot be lower than this on Kelvin scale
The volume of a given sample of gas at constant pressure is directly proportional to the temperature in kelvins
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
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.
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
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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