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# Gas Laws Review

### Review of Gas Laws

PI V1 = P2 V2 Boyle's Law
V1 /T1 = V2/T2 Charles's Law
P1 /T1 = P2/ T2 Gay-Lussac's Law
P1V1 / T1 = P2V2 / T2 Combined Gas Law
PV = nRT Ideal Gas Law
used to find rates of effusion Graham's Gas Law
relationship between pressure and volume inversely proportional
states that gas particles are easily compress or expand due to the empty space between them kinetic theory
state of matter with indefinite volume and indefinite shape gas
Percent of real gases on Earth 100%
Percent of ideal gases on Earth 0%
Conditions at STP for gas laws 273K and 101.3 kPa
Units for Volume Liters (L)
Units for pressure kPa
R is this numerical value 8.31
n stands for this number of moles
Ptotal = P1 + P2 + P3 + ....... Dalton's Gas Law (of partial pressures)
relationship between volume and temp OR pressure and temp. directly proportional
PV to nRT ratio is always this number for ideal gases 1
real gases behave like ideal gases at these conditions low pressure & high temperature
molecules moving from high concentration to low concentration (until concentration becomes equal) diffusion
gas molecules escaping through a tiny hole in container effusion
real gases differ from ideal gases at these conditions high pressure & low temperature
volume and attraction between particles of an ideal gas zero (none)
phase change from solid to gas sublimation
phase change from liquid to gas evaporation (boiling)
obeys all gas laws at all conditions, no volume , no attraction b/w particles ideal gas properties
Units for temperature (used in gas laws) Kelvin (K)