Lecture 21: Kinetic Molecular Theory

Question 1

Kinetic Molecular Theory

Answer 1

Gas molecules:
-insignificant volumes compared to containers volume
-move randomly and constantly
-collide elastically with walls of container and gas molecules
-no intermolecular interactions
-average KE is proportional to temperature

Question 2

at a given T all gases have same KE but different…

Answer 2

speed

Question 3

what is RMS

Answer 3

root mean square speed, average KE

Question 4

RMS temperature units

Answer 4

Kelvins

Question 5

RMS gas constant

Answer 5

8.3145 J/(mol*K)

Question 6

Pressure equation

Answer 6

P=F/A

Question 7

higher elevation has a ? atmospheric pressure

Answer 7

lower

Question 8

what does a barometer measure

Answer 8

atmospheric pressure

Question 9

as T increases, speed…

Answer 9

increases

Question 10

as mass increases, speed…

Answer 10

decreases

Question 11

effusion

Answer 11

gas escaping container through tiny hole, into lower concentration

Question 12

diffusion

Answer 12

spread of one gas through another gas

Question 13

heavier gases effuse/diffuse more…

Answer 13

slowly

Question 14

RMS molar mass units

Answer 14

kg