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Chemistry 101 > unit 6 > Flashcards

unit 6 Flashcards

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1
Q

mixing of two or more gases based solely on their molecular motions

A

diffusion

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2
Q

movement of a gas through a semipermeable membrane from a region of higher pressure to a region of lower pressure

A

effusion

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3
Q

speed at which a molecule is moving

A

molecular speed

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4
Q

energy of motion

A

kinetic energy

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5
Q

what factors can affect the molecular speed

A

temperature and mass

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6
Q

at higher temps the distribution of molecular speed is

A

wider

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7
Q

at lower temps the distribution of molecular speed is

A

narrower

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8
Q

at higher temps the average molecular speed is

A

larger

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9
Q

gas with the WHAT mass has the largest average molecular speed

A

smallest

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10
Q

porous barrier

A

semipermeable membrane

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11
Q

why does hydrogen diffuse faster than nitrogen

A

smaller mass, wider distribution of molecular speeds, larger average molecular speed

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12
Q

rate of effusion of gas 1
rate of effusion of gas 2

square root: molar mass of gas 2
molar mass of gas 1

A

grahams law

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13
Q

water displacement

A

daltons law of partial pressure

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14
Q

total pressure exerted by a mixture of gases is the sum of their individual partial pressures

A

daltons law of partial pressure

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15
Q

P tot

A

ATM

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16
Q

V

A

liters

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17
Q

nTOT

A

total number of moles

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18
Q

r

A

0.08206 L ATM over MOLE K

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19
Q

T

A

kelvin

20
Q

describes how gas would ideally behave

A

ideal gas law

21
Q

works very well at temperatures near room temp and pressure near atmospheric pressure

A

ideal gas law

22
Q

works less well at really low temps or really high temps

A

ideal gas law

23
Q

at high pressure the distances between the gas particles

A

decrease

24
Q

at low temps the distance between the gas particles

A

decrease

25
Q

force per unit area

A

pressure= force OVER unit area

26
Q

atmospheric pressure is measured

A

barometer

27
Q

STP

A

standard temperature and pressure

28
Q

stp represents what

A

O degrees c and pressure of 1 atm

29
Q

would have zero pressure

A

complete vaccum

30
Q

indicated a pressure noticeably less than atmospheric pressure

A

vaccum

31
Q

what effects pressure on the volume

A

constant temperature and constant number of moles

32
Q

boyles law

A

P1V1=P2V2

33
Q

what is the effect of temp on the volume

A

constant pressure and constant moles

34
Q

increased temp, increased volume

A

charles

35
Q

what is the effect of the number of moles on the volume

A

constant pressure and constant temp

36
Q

increase number of moles, volume increase

A

avogadros

37
Q

1 atm

A

760 mm hg

38
Q

1 torr

A

1 mm hg

39
Q

ideal gas law

A

PV=nRT

40
Q

P

A

PRESUURE (ATM)

41
Q

VOLUME

A

LITERS

42
Q

N

A

NUMBER OF MOLES

43
Q

R

A

0.08206

44
Q

T

A

TEMP IN KELVIN

45
Q

sodium azide

A

NaN3

46
Q

mw

A

molar mass of the gas (g/mole)

Chemistry 101 (8 decks)

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