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Chapter 6 - Properties of Gases
Vocabulary
25
Chemistry
Undergraduate 1
05/04/2010

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Term
Pressure
Definition
defined as the ratio of force to surface area
Term
Atmospheric Pressure
Definition
the force exerted by the gases surrounding the earth on earth's surface and on all surfaces of al objects
Term
Barometer
Definition
an instrument that measures atmospheric pressure
Term
Standard Atmosphere
Definition
the pressure capable of supporting a column of mercury 760nm high in a barometer
Term
Millimeters of Mercury
Definition
measurement of pressure also called torr
Term
Manometer
Definition
an instrument for measuring the pressure exerted by a gas
Term
Boyle's Law
Definition
states that the volume of a given amount of a gases at constant temperature is inversely proportional to its pressure
Term
Charles' Law
Definition
states that the volume of a fixed quantity of gase at constant pressure is directly proportional to its absolute temperature
Term
Avagadro's Law
Definition
states that the volume of a gas at a given temperature and pressure is proportional to the quantity of the gas
Term
Amonton's Law
Definition
states that, as the absolute temperature of a fixed amount of gas increases, the pressure increases as long as the volume and quantity of the gas remain constant
Term
Ideal Gas
Definition
a gas whose behavior is predicted by the linear relations definied by Boyle's, Charles', Avagadro's, and Amonton's laws
Term
Ideal Gas Equation
Definition
relates the pressure, volume, number or moles, and temperature of an ideal gas
Term
Universal Gas Constant
Definition
the numerical constant "R" in the ideal gas equation, it's value and units depend on the units used for the variables in the ideal gas equation
Term
General Gas Equation
Definition
based on the ideal gas law; used when one or more of the four gas variables are held constant while the remaining variables change
Term
Standard Temperature and Pressure
Definition
a temperature of zero degrees celsius and a pressure of one atmosphere
Term
Molar Volume
Definition
the volume occupied by one mole of a gas at STP; equal to 22.4 L
Term
Partial Pressure
Definition
the contribution to the total pressure made by a component gas in a gas mixture
Term
Dalton's Law of Partial Pressures
Definition
states that the total pressure of any mixture of gases equals the sum of the partial pressures of each gas in the mixture
Term
Mole Fraction
Definition
the ratio of the number of moles of a component in a mixture to the total number of moles in a mixture
Term
Kinetic Molecular Theory
Definition
a model that describes the behavior of gases; based on a set of assumptions, and all the equations that define the relations between pressures, volume, temperature, and number of moles of gases can be derived by the theory
Term
Root-Mean-Square Speed
Definition
the square root of the average of the squared speeds of all the molecules; a molecule possessing the average kinetic energy moves at this speed
Term
Effusion
Definition
the process by which a gas escapes from its container through a tiny hole into a region of lower pressure
Term
Graham's Law of Effusion
Definition
states that the rate of effusion of a gas is inversely proportional to the square root of its molecular mass
Term
Diffusion
Definition
the speed of one substance (usually a gas or liquid) through another
Term
Van der Waals Equation
Definition
attempts to account for the behavior of real gases by including experimental determined factors that quantify the contributions of molecular volume and intermolecular interactions to the properties of gases
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