Gas Laws

Front 1

The Gas laws involve the relationship of four properties of gases

Back 1

pressure (P), volume (V), temperature (T(lil)k), & moles (n)

Front 2

Boyle’s Law:
Vary:
Constant:
Formula:

Back 2

Vary: P & V Pressure & Volume
Constant: T & n Temp & moles
Formula: P1V1=P2V2

Front 3

Charles’ Law:
Vary:
Constant:
Formula:

Back 3

Vary: V & T Volume & Temp
Constant: P & n Pressure & moles
Formula: V1/T1=V2/T2
Temp in Kelvin
covert C by adding 273

Front 4

Gay-Lussac’s Law:
Vary:
Constant:
Formula:

Back 4

Vary: P & T Pressure and Temp
Constant: V & n Volume and moles
Formula: P1/T1=P2/T2

Temp must be in Kelvin

Front 5

Combined Gas Law:
Vary:
Constant:
Formula:

Back 5

Vary: V, P & T Volume, Pressure & Temp
Constant: n moles
Formula: P1V1/T1=P2V2/T2

Front 6

Avogadro’s Law
Vary:
Constant:
Formula:

Back 6

Vary: V & n Volume and moles
Constant: P & T Pressure and Temp
Formula: V1/n1=V2/n2

Front 7

Avogadro’s Law: (variation)
Vary:
Constant:
Formula:

Back 7

Vary: P & n Pressure & moles
Constant: V & T Volume & Temp
Formula: P1/n1=P2/n2

Front 8

Molar Volume of a Gas: (volume occupied by one mole of a gas)

Back 8

-One mole of any gas occupies 22.4 L at standard temperature and pressure (STP).
-standard temperature: 0oC; 273 K
-standard pressure: 760 mm Hg; 1 atm; 101.3 kPa

Front 9

Density =

Back 9

mass/volume

Front 10

Density of a gas at STP

Back 10

molar mass/22.4 L

Front 11

Ideal Gas Law:

Back 11

PV = nRT
If pressure is in atm & volume is in L, the R = 0.0821 L.atm/mol.K; temperature is always in Kelvin; n = number of moles
-if the mass is given, the mass can be converted to moles and used in the Ideal Gas Law equation

Front 12

Dalton’s Law of Partial Pressures:
Vary:
Constant:
Formula:

Back 12

-in a mixture of gases, each gas exerts a pressure it would if it were alone in the container. The total pressure of the gases in the mixture is equal to the sum of the individual partial pressures of the gases in the mixture.
Vary:P Prssure
Constant:
Formula: PT=P1+P2+P3...