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Chemistry 11th grade

chapter 5

Absolute zero the theoretically lowest possible temperature, 0 K, at which molecular motion ceases and gas volume becomes zero
Avogadro's law equal volumes of gases at the same temperature and pressure contain epual numbers of molecules
Barometer a device used to measure atmospheric pressure
Boyle's law the volume of a given mass of a gas at constant temperature is inversely proportional to the pressure
Charles's law the volume of a given mass of a gas at constant temperature is directly proportional to the absolute temperature
Dalton's law of partial pressures the total pressure of a mixture of gases is equal to the sum of the partial pressures of each gas
Diffusion the process in which a gas uniformly spreads throughout a larger volume by random movement and collisions
Gay-Lussac's law of combining volumes when measured at the same temperature and pressure, the ratio of the volumes of gases that react or that are formeed as products are small whole numbers
Graham's law of diffusion the velocities and thus the rates of diffusion of two gases under the same conditions of temperature and presure are inversely propotional to the square root of their molar masses
Ideal gas A theoretical gas which adheres exactly to the gas laws
Ideal gas equation an equation relating pressure, volume, moles, and temperature of an ideal gas; PV=nRT
Kinetic-molecular theory A model which is used to explain gas behavior on the major premise that molecules are in constant motion
Manometer a device consisting of two types, open-end and closed-end, used in the laboratory to measure gas pressures
Molar volume the volume of one mole of a gas under STP conditions, generally given as 22.4 L
Partial pressure the pressure exerted by a gas in a mixture of gases, independently of the other gases that are present
Pressure A force per unit area
Standard temperature and pressure (STP) defined as 0 degrees C and 1 atm or 760 torr. In this text, most calculations involving STP use the figure 273 K for ease of calculation
Created by: turtlefan1818