Unit 3 Gases Flashcards
what is the equation for pressure?
P=force/area
properties of macroscopic level
TVnP
temperature, volume, moles, pressure
what are the five rules of the kinetic molecular theory?
RCIEK
- gases made of tiny particle move at random
- total number of particles is very small compared to the size of the containers its in
- particles do not interact with each other
- particle collision are elastic so no energy is lost
- kinetic energy increase with temperature
the formula for average kinetic energy? value of R? units for R)
K.E=3/2RT
R=8.3145(J/molK)
what is formula to find kinetic energy in terms of mass and speed?
K.E=1/2mv^2
what is formula to find kinetic energy in terms of mass and average speed?
K>E=1/2mu^2
What does pressure result from?
results from gas particles colliding with container walls
Boyles law equation? relationship?
P{1}V{1}=P{2}V{2}
pressure of gas inversely proportional to volume
Charles law? what is the relationship?
V1/t1-V2/t2
volume proportional to temperature
avagadros law? relationship?
V1/n1=V2/n2
ideal gas equation and value of R
PV=NRT
R=0.08206 J/mol(K)
partial pressure law
total pressure is equal to the sum of all partial pressure
calculate partial pressure using the ideal gas equation
how to calculate the partial pressure given the moles of three molecules and a torr number
- take the mole fraction of each element so the number of moles of one of the elements divided by the total moles
- multiply the answer of each mole fraction by the pressure to get the partial pressure of each element
effusion
the escape of gas through a hole in a vacuum
diffusion
the movement of gas through another
what happens to diffusion and effusion when speed goes up
there rates increase
how is the fact that mass and speed are inversely proportional shown (mass of red and black particles vs the speed of red and black particles)
(m red/mblack)^1/2=ublack/ured
How to convert from torr to atm
Divide by 760 torr
How many kPa are in one atm
101.325
where are gases found? AEB
atmosphere of Earth and other planets
engineering
biological systems
what are the properties of the molecular level?
structure dynamics of intermolecular forces
what is kinetic energy proportional to?
temperature
what are the sizes of molecules inversely proportional to?
temperature
is the pressure of gas greater than or less than atmospheric pressure?
less than
