Unit 3.5 Flashcards

1
Q

kinetic energy formula

A

KE=1/2mv^2

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2
Q

ideal gas laws (1-3)

A

-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

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3
Q

ideal gas laws (4-7)

A

-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

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4
Q

x and y axis of maxwell-boltzmann distribution curve is

A

x- particle speed
y- # of particles

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5
Q

the peak in a maxwell-boltzmann distribution curve is

A

the most probable speed

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6
Q

higher, skinnier curve=

A

heavier particles slower avg speed

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7
Q

lower, fatter curve=

A

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

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8
Q

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

A

yes

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9
Q

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

A

smaller

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10
Q

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

A

less

bc of less colliding forces bc of attractive forces

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11
Q

more collisions= ____ pressure

A

higher

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12
Q

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

A

high temperatures and low pressures

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13
Q

the greater the mass of an element the ____ the speed

A

slower

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14
Q

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

A

the polar one

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15
Q

periodic table:
He
Xe

which one will have relatively higher pressure

A

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

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16
Q

what is an aqueous solution

A

a substance that was dissolve completely in water

17
Q

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

A

stronger to weaker
(never reverse ever)

18
Q

frequency from red->purple
wavelengths

A

lowest->highest
highest->lowest

19
Q

electromagnetic spectrum from biggest wavelength to smallest

A

radio
microwave
infared
visable
ultraviolet
xray
gamma

20
Q

2 light formulas

A

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

21
Q

C

A

3.010^8m or
3.0
10^17nm

22
Q

h

A

6.63*10^-34 J

23
Q

convert kJ to J

A

multiply by 1000

24
Q

“how many photons”

25
Photons given
E=T/photons
26
microwave effect and relative energy
rotate and low energy
27
infrared effect and relative energy
stretch and vibrate, medium energy
28
visible and ultraviolet effect and relative energy
electrons move up to higher energy level, high energy
29
convert J to KJ
divide by 1000
30
Al: vapor pressure:10 temp:1780 Ag: vapor pressure:10 temp:1540 which one has a stronger attractive force
Al bc Al requires more heat to overcome its molecular forces so it needs more energy