chapter 5

Question 1

Properties of gases (5)

Answer 1

FEM CD
fills a container uniformly
exerts pressure on surroundings
mixes with other bases
compressed compared to solids and liquids
density is lower than liquid or solid

Question 2

density

Answer 2

mass/volume

Question 3

pressure

Answer 3

force/area

Question 4

1 pascal

Answer 4

newton / meter^2

Question 5

1 standard atmosphere (atm) =

Answer 5

101,325 Pa = 760 mm Hg = 760 torr

Question 6

STP

Answer 6

standard temperature + pressure
the pressure at 760 mm column of Hg and 0 degrees Celsius

Question 7

we can measure pressure with

Answer 7

barometers and manometers

Question 8

a barometer measures

Answer 8

atmospheric pressure

Question 9

a manometer measures

Answer 9

pressure of gas in a container

Question 10

how does a barometer work?

Answer 10

Air pressure outside of the tube counterbalances the weight of mercury in the tube

Question 11

Charles’ Law

Answer 11

V = bT

Question 12

Avogadro’s Law

Answer 12

V = an

Question 13

Boyle’s Law

Answer 13

V = K/P

Question 14

Ideal Gas Law

Answer 14

P V = n R T

Question 15

universal gas constant (R)

Answer 15

.08206 (L x ATM) / (mol x K)

Question 16

density of gas formula

Answer 16

(P (mm)) / RT

Question 17

the pressure a gas will exert…

Answer 17

is independent of its identity under ideal conditions

Question 18

total gas pressure formula

Answer 18

Ptotal = (n1+n2+n3+nn)((RT)/V)

Question 19

mole fraction for total gas pressure

Answer 19

n1 / nt

Question 20

5 elements that exist as gases at room temp

Answer 20

H, O, N, C, F

Question 21

5 compounds that exist as gases at room temp

Answer 21

CO2, CO, CH4, NH3, NO

Question 22

4 postulates of kinetic molecular theory

Answer 22

1. gas particles are so small compared to the distance between them that the volume of individual gas particles is assumed to be zero
2. particles are in constant motion.
3. particles exert no force on each other
4. the average kinetic energy of particles is directly proportional to the kelvin temperature of gas.

Question 23

collisions to the wall of a container =

Answer 23

pressure

Question 24

lighter particles are

Answer 24

faster

Question 25

diffusion

Answer 25

mix of gases

Question 26

effusion

Answer 26

a gas under pressure passing through a tiny hole from one container to another

Question 27

the ideal gas law does not work when...

Answer 27

temp is too low and/or pressure is too high

Question 28

under circumstances where ideal gas law cannot be used...

Answer 28

concentration of gas particles is high and attractive forces become important

Question 29

for real gases, what equation is used?

Answer 29

vanderwaals

Question 30

the volume of a real gas is ... than the volume of an ideal gas

Answer 30

higher