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27 Cards in this Set

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Compressibility
measure of how much the volume of matter decreases under pressure.
Why are gases easily compressed?
Because of the space between the particles in a gas.
What factors affect gas pressure?
The amount of gas, volume and temperature.
Boyle's Law
For a given mass of of gas at a constant temperature, the volume of the gas varies inversely with pressure.
Boyle's Law equation
P1 x V1 = P2 x V2
Charles's Law
the volume of a fixed mass of gas is directly proportional to its Kelvin temperature if the pressure is kept constant.
Charles's Law equation
V1/T1 = V2/T2
Gay-Lussac's Law
the pressure of a gas is directly proportional to the Kelvin temperature if the volume remains constant.
Gay-Lussac's Equation
P1/T1 = P2/T2
The Combined Gas Law
The combined gas law allows you to do calculations for situations in which only the amount of gas is constant
Combined Gas Law Equation
P1 x V1/T1 = P2 x V2/T2
Ideal Gas Law
To calculate the number of moles of a contained gas requires an expression that contains the variable n. The gas law that includes all 4 variables - P, V, T and n is the ideal gas law.
Ideal Gas Law equation
P1 x V1/T1 x n1 = P2 x V2/T2 x n2 OR

P x V = n x R x T or PV = nRT
What is the value of the ideal gas constant R?
r = 0.0821 L x atm/mole x K

or 8.315 dm3 x kPa/mole x K
When do real gases differ most from an ideal gas?
at low temperatures and high pressures
Dalton's Law of partial pressures
at constant volume and temperature, the total pressure exerted by a mixture of gases is equal to the sum of partial pressures of the component gases
Dalton's equation
P total = P1 + p2 +p3+...
How many liters does 1 mole of gas occupy at standard tyemperature (273K) and pressure(101.3kPa) (STP)?
22.4L
Avogadro's Principle
V1/n1 = V2/n2
1 atmosphere is equal to how many kPA?
1 atm = 101.3kPA
How many mm HG is 1 atmosphere equal to?
1 atmosphere is equal to 760 mm HG;
converting kPa to atmospheres
1 atmosphere/101.3 kPa
converting kPa to mm HG
760mm HG/101.3kPa
Kelvin boiling point
373 degrees Kelvin
Kelvin freezing point
273 degrees Kelvin
1 bar is equal to
14.503774 pounds per square inch (psi)
1 torr
1 mmHG at 0 degrees Celsius