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Unit 8 Gases

Gases

TermDefinition
Pressure (P) it is defined as the force per unit area on a surface.
Newton It is the force that will increase the speed of a one kilogram mass by one meter per second each second that the force is applied.
barometer It is the device used to measure the atmospheric pressure
Millimeter of Mercury It is the common unit of pressure, symbolized by mm Hg
Atmosphere of pressure It is defined as being exactly the equivalent to 760 mm Hg
Pascal (Pa) it is defined as the pressure exerted by a force of one newton (1 N) acting on an area of one square meter
Partial pressure It is the pressure of each gas in a mixture.
Dalton's law of partial pressure It states that the total pressure of gas mixture is the sum of the partial pressure of the component gases.
Boyle's law It states that the volume of a fixed mass of gases varies inversely with the pressure at constant temperature.
Absolute zero It is the lowest possible achievable temperature, ad it is assigned the value of zero on the kelvin temperature scale.
Charles' law It states that the volume of a fixed mass of gas at constant pressure varies directly with the temperature in kelvin.
Gay - Lussac law The pressure of a fixed mass of gas at constant pressure varies directly with the temperature in kelvin
Combined gas law Expresses the relationship between pressure, volume, and temperature of a fixed amount of gas
Avogadro's law States that equal volumes of gases at the same temperature and pressure contain equal number of molecules
Standard molar mass of a gas The volume occupied by one mole of a gas at STP , and it has been found to be 22.4 L
Ideal gas law It is the mathematical relationship among pressure, volume , temperature, and the number of moles of a gas.
Ideal gas constant It is the constant R found in the equation representing the ideal gas law
Graham's law of effusion States that the rates of effusion of gases at the same temperature and pressure are inversely proportional to the square root of their molar mass.
Created by: ll458868
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