Physical Behavior of Gases Flashcards
tempurature
a measure of the average KE of the molecules in a sample; mass and velocity
absolute zero
0 K all molecular motion stops
STP conditions
1 atm, 273K standard temperature and pressure
pressure
force per unit area: P=F/A
pressure unit conversions
1 atm = 760 mm Hg = 760 torr = 14.7 psi = 101.3 Kpa
atmospheric pressure
pressure that is exerted on the Earth’s surface by the gas molecules in the Earth’s atmosphere
Dalton’s law of partial pressures
total pressure in any enclosed space is equal to the sum of the partial pressures in the system
Kinetic Molecular Theory
- gas molecules spaced far apart and mostly empty space 2. continuous rapid and linear motion; average speed is 1000 m/s 3.pressure is result of collisions with the walls of the container 4.increase in temp results in increase of speed
Boyle’s law
PV=PV pressure inversely proportional with volume; V=P1V1/P2
Charle’s law
V/T=V/T volume and temperature are directly proportional; V2=V1T2/T1
Gay-Lussac’s law
P/T=P/T pressure and temperature are proportional
combined gas law
PV/T=PV/T; V2=P1V1T2/T1P2
volume and mass at constant temp and press
volume is proportional to the mass of a gass
molar volume
equal to molar mass divided by density; L/mole
Avagadro’s hypothesis
one mole of any gas under STP conditions will occupy a volume of 22.4 L/mole
