unit 6 Flashcards
(46 cards)
mixing of two or more gases based solely on their molecular motions
diffusion
movement of a gas through a semipermeable membrane from a region of higher pressure to a region of lower pressure
effusion
speed at which a molecule is moving
molecular speed
energy of motion
kinetic energy
what factors can affect the molecular speed
temperature and mass
at higher temps the distribution of molecular speed is
wider
at lower temps the distribution of molecular speed is
narrower
at higher temps the average molecular speed is
larger
gas with the WHAT mass has the largest average molecular speed
smallest
porous barrier
semipermeable membrane
why does hydrogen diffuse faster than nitrogen
smaller mass, wider distribution of molecular speeds, larger average molecular speed
rate of effusion of gas 1
rate of effusion of gas 2
square root: molar mass of gas 2
molar mass of gas 1
grahams law
water displacement
daltons law of partial pressure
total pressure exerted by a mixture of gases is the sum of their individual partial pressures
daltons law of partial pressure
P tot
ATM
V
liters
nTOT
total number of moles
r
0.08206 L ATM over MOLE K
T
kelvin
describes how gas would ideally behave
ideal gas law
works very well at temperatures near room temp and pressure near atmospheric pressure
ideal gas law
works less well at really low temps or really high temps
ideal gas law
at high pressure the distances between the gas particles
decrease
at low temps the distance between the gas particles
decrease
