chapter 10 review Flashcards

1
Q

gas

A

most freedom of the states
mixes freely with other gases, changes its shape and volume to fit into any container, compressible

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2
Q

pressure=

A

force / area

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3
Q

how do you measure atmospheric pressure

A

barometer

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4
Q

manometers

A

used to measure the pressure of a sample of gas

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5
Q

Pgas(mm Hg)=

A

Patm +/- height difference

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6
Q

1 mmHg=

A

1 torr

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7
Q

1 atm=

A

760 mm Hg/torr

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8
Q

1 atm=

A

101325 Pascals or 101.325 KPa

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9
Q

boyles law

A

pressure and volume have an inverse relationship
P1V1=P2V2

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10
Q

if volume increases (bl)

A

pressure decreases

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11
Q

if pressure increases (bl)

A

volume decreases

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12
Q

charles law

A

volume and temperature are directly related
v1/t1 = v2/t2

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13
Q

if temperature increases (cl)

A

volume increases

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14
Q

avogadros law

A

volume and moles of gas are directly related
v1/n1=v2/n2

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15
Q

if volume increases (al)

A

moles increase

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16
Q

1 mol of an ideal gas occupies

A

22.4 L at STP

17
Q

ideal gas law

18
Q

ideal gas law R

A

0.08296 L atm/mol K

19
Q

gasses follow the ideal gas law best at

A

low pressures and high temperatures

20
Q

M (molar mass)=

21
Q

density (for gas)

22
Q

the pressure gases are additive…

A

the total pressure of a mixture of gases is the sum of the partial pressures of each gas

24
Q

p total eq (2)

A

sum of p1+p2+p3…
=ntotal(RT/V)

25
x1=
n1/ntotal=p1/ptotal
26
p1=
(n1/ntotal)Ptotal
27
kinetic molecular theory
-vol of gas is negligible -particles are in constant motion and hit the walls of the container to create pressure -particles of gases don't attract or repel each other (elastic collisions) -average kinetic energy of a gas is directly proportional to the temperature (kelvin) or a gas
28
(KE)avg=
3/2 RT
29
velocity=
squareroot(3RT/M)
30
urms R
8.314 JK mole
31
slower urms=
bigger atomic mass
32
faster urms=
smaller molar mass
33
effusion
passage of gas through tiny orifice into an evacuated chamber
34
rate of effusion gas1/ rate of effusion gas 2 =
√MW2/√MW1
35
diffusion
mixing of gases