Section 5.4 Diffusion, Partial Pressures, and Stoichiometry

Question 1

the process of mixing molecules of one substance through another by random molecular motion

Answer 1

diffusion

Question 2

discovered that lightweight gases diffuse much more rapidly than heavier gases

Answer 2

Thomas Graham

Question 3

_______________ molecules diffuse more rapidly because they are moving faster at any given temperature than heavier molecules

Answer 3

lighter

Question 4

rater of diffusion

Answer 4

1/ (square root) M

Question 5

the principle that the diffusion rate of any gas is inversely proportional to the square root of the gas’s molar mass

Answer 5

Graham’s law of diffusion

Question 6

Graham’s law of diffusion equation

Answer 6

rate1/rate2= (square root of…) M2/M1

Question 7

each gas in a mixture of gases expands to occupy the entire volume o its container and exerts ______________ which is independent of all others gases in the container

Answer 7

partial pressure

Question 8

principle that states that the pressure in a container filled with a mixture of gases is the sum of the partial pressures of all the gases in the container

Answer 8

Dalton’s law of partial pressures

Question 9

Dalton’s law of partial pressures mathematically

Answer 9

P total= p1 + p2 + p3 …

Question 10

whenever the phrase “collected over water” is used, be sure to correct the ______________ for the presence of water vapor

Answer 10

pressure