Unit 3.5

Question 1

kinetic energy formula

Answer 1

KE=1/2mv^2

Question 2

ideal gas laws (1-3)

Answer 2

-gas particles are in constant random rapid motion
-gases expand to fill their container completely
-two or more gases will form a homogeneous mixture when combined

Question 3

ideal gas laws (4-7)

Answer 3

-gases are highly compressible
-the volume of the gas particles themselves is negligible compared to the volume occupied by the gas
-collisions of gas particles are perfectly elastic, meaning the energy is transferred but not lost during collisions
-there are no attractive or repulsive forces

Question 4

x and y axis of maxwell-boltzmann distribution curve is

Answer 4

x- particle speed
y- # of particles

Question 5

the peak in a maxwell-boltzmann distribution curve is

Answer 5

the most probable speed

Question 6

higher, skinnier curve=

Answer 6

heavier particles slower avg speed

Question 7

lower, fatter curve=

Answer 7

lighter particles, faster avg speed, moves more to the right

Question 8

2 elements that have the same temp, do they have the same kinetic energy?

Answer 8

yes

Question 9

when particles have attractive forces will they collide with smaller or stronger force of impact?

Answer 9

smaller

Question 10

is the pressure of real gas less or greater than the value predicted by the ideal gas law

Answer 10

less

bc of less colliding forces bc of attractive forces

Question 11

more collisions= ____ pressure

Answer 11

higher

Question 12

a gas should exhibit ideal behavior at relatively _____ temperatures and ____pressures

Answer 12

high temperatures and low pressures

Question 13

the greater the mass of an element the ____ the speed

Answer 13

slower

Question 14

2 molecules, 1 polar and 1 nonpolar, which one will have relatively low temperatures

Answer 14

the polar one

Question 15

periodic table:
He
Xe

which one will have relatively higher pressure

Answer 15

Xe bc larger atomic radius so bc its bigger there will be less space in the container so more collisions, higher pressure

Question 16

what is an aqueous solution

Answer 16

a substance that was dissolve completely in water

Question 17

when a aqueous solution is formed what will the change in strength be

Answer 17

stronger to weaker
(never reverse ever)

Question 18

frequency from red->purple
wavelengths

Answer 18

lowest->highest
highest->lowest

Question 19

electromagnetic spectrum from biggest wavelength to smallest

Answer 19

radio
microwave
infared
visable
ultraviolet
xray
gamma

Question 20

2 light formulas

Answer 20

C=yv
E=hc/y or y=hc/E or E=hv

Question 21

C

Answer 21

3.010^8m or
3.010^17nm

Question 22

h

Answer 22

6.63*10^-34 J

Question 23

convert kJ to J

Answer 23

multiply by 1000

Question 24

“how many photons”

Answer 24

T/E

Question 25

Photons given

Answer 25

E=T/photons

Question 26

microwave effect and relative energy

Answer 26

rotate and low energy

Question 27

infrared effect and relative energy

Answer 27

stretch and vibrate, medium energy

Question 28

visible and ultraviolet effect and relative energy

Answer 28

electrons move up to higher energy level, high energy

Question 29

convert J to KJ

Answer 29

divide by 1000

Question 30

Al: vapor pressure:10 temp:1780
Ag: vapor pressure:10 temp:1540

which one has a stronger attractive force

Answer 30

Al bc Al requires more heat to overcome its molecular forces so it needs more energy