Term

Definition
A unit of pressure equal to 760 torr; 1 atm = 101.325 kPa. 


Term

Definition
A statement that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules. 


Term

Definition
A statement that the volume of a gas maintained at a constant temperature and pressure is directly proportional to the number of moles of the gas. 


Term

Definition
A united of pressure equal to 105 Pa. 


Term

Definition
A law stating that at constant temperature, the product of the volume and pressure of a given amount of has is a constant. 


Term

Definition
A law stating that at constant pressure, the volume of a given quantity of gas is proportional to absolute temperature. 


Term
Dalton’s Law of Partial Pressures 

Definition
A law stating that the total pressure of a mixture of gasses is the sum of the pressures that each gas would exert if it were present alone. 


Term

Definition
The spreading of one substance through a space occupied by one or more other substances. 


Term

Definition
The escape of a gas through an orifice or hole. 


Term

Definition
The constant of proportionality in the idealgas equation. 


Term

Definition
A law stating that the rate of effusion of a gas is inversely proportional to the square root of its molecular weight. 


Term

Definition
A hypothetical gas whose pressure, volume, and temperature behavior is completely described by the idealgas equation. 


Term

Definition
An equation of state for gases that embodies Boyke’s law, Charles’s law, and Avogadro’s Hypothesis in the form PV = nRT. 


Term

Definition
A set of assumptions about the nature of gasses. These assumptions when translated into mathematical form, yield the idealgas equation. 


Term

Definition
The average distances traveled by a gas molecule between collisions. 


Term

Definition
The ratio of the number of moles of one component of a mixture to the total moles of all components; abbreviated X, with a subscript to identify the component. 


Term

Definition
The pressure exerted by a particular gas in a mixture. 


Term

Definition
The SI unit of pressure: 1 Pa = 1N/m2. 


Term

Definition
A measure of the force exerted on a unit area. In chemistry, pressure is often expressed in unites of atmospheres (atm) or torr; 760 Torr = 1 atm; in SI units pressure is expressed in pascals. 


Term
Rootmeansquare (rms) Speed (μ) 

Definition
The square root of the average of the squared speeds of the gas molecules in a gas sample. 


Term
Standard Atmospheric Pressure 

Definition
Defined as 760 torr or, in SI units, 101.325 kPa. 


Term
Standard Temperature and Pressure 

Definition
Defined as 0oC and 1 atm pressure; frequently used as reference conditions for a gas. 


Term

Definition
A unit of pressure (1 torr = 1 mm Hg). 


Term

Definition
An equation of state for nonideal gases that is based on adding corrections to the idealgas equations. The correction terms account for intermolecular foreces of attraction and for the volumes occupied by the gas molecules themselves. 


Term

Definition
Gaseous state of any substance that normally exists as a liquid or solid. 

