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Unit 3: Gas Laws
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Gravity
Terms in this set (51)
mass, low, compressed, fill, move through, pressure
Properties of Gas: have _______, have _____ densities, easily ____________, completely ____ their container, can _____ _________ each other rapidly, exert _________
diffusion
the movement of one substance through another
gas pressure
caused by collisions of the gas molecules with the sides of their container
temperature
pressure is directly proportional to
constant random, straight line, negligible, attraction, elastic
Gas particles are: __________ _________ motion, _________ _____ motion, __________ volume, no forces of __________, ________ collisions
Kelvin
Temperature (determines average kinetic energy of the particles) must be expressed in
liters
Volume is usually expressed in
1cm^3
1mL=
pressure
P=
1atm
the force the air in the atmosphere exerts on the Earth at sea level
760
1 atm = ? mm Hg
760
1 atm = ? torr
101,325
1 atm = ? Pa
101.325
1 atm = ? kPa
1.00
STP for atm
0°
STP for Celcius
STP
stands for "standard temperature and pressure"
Avogadro's Principle
states that equivalent volumes of gases under the same conditions have an equal number of particles
22.4
1 mole of any gas at STP has a volume of ? L
Boyle's Law
states that the pressure and volume of a sample of gas at constant temp are inversely proportional to each other
P1V1=P2V2
Boyle's Law Formula
Charles's Law
states that at constant pressure, the volume of a fixed amount of gas is directly proportional to its absolute temperature
V1/T1=V2/T2
Charles's Law Formula
Charles's Law
What is absolute zero predicted by?
0K
Absolute zero value
all motion stops
What happens at absolute zero?
No
Can absolute zero be obtained by gases?
Gay-Lussac's Law
states that the pressure of a gas is directly proportional to the temperature if the volume remains constant
P1/T1=P2/T2
Gay-Lussac's Law Formula
Combined Gas Law
combines Charles's, Boyle's and Gay-Lussac's Laws
P1V1/T1=P2V2/T2
Combined Gas Law Formula
temperature (Kelvin)
T=
volume
V=
°C+273
Formula for converting Celsius to Kelvin
Ideal Gas Law
law that describes the physical behavior of an ideal gas in terms of the pressure, volume, temperature, and the # of moles of gas
No
Is there an ideal gas?
PV=nRT
Ideal Gas Law Formula
.0821
R=? atmL/molK
8.314
R=? kPaL/molK
number of moles
n=
Dalton's Law of Partial Pressures
states that the sum of the partial pressures of all the components in a gas mixture is equal to the total pressure of the gas mixture
mole fractions
can be used to determine partial pressures
PT = Pa + Pb + Pc + . . .
Dalton's Law of Partial Pressures Formula
Graham's Law
states that under the same conditions (constant temp and press), gases diffuse at a rate inversely proportional to the square roots of their densities (or molecular masses)
velocity of gas
v=
mass
m=
effusion
the movement of atoms or molecules through a hole so tiny that they do not stream through, but instead pass through one particle at a time
lighter
Do lighter or heavier gases diffuse and effuse faster?
lighter
In Graham's Law is gas A lighter or heavier?
va/vb=√mb/ma
Formula for Graham's Law
PT=Pdry gas+PH20
Formula for calculated partial pressures of a wet gas
;