Gases Flashcards

1
Q

kinetic molecular theory

A

five postulates that can derive the ideal gas laws

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2
Q

postulate one

A

particles of a gas are in constant motion and collide with both one another and the container

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3
Q

postulate two

A

the pass is mostly empty sapce

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4
Q

postulate three

A

pressure is exerted when the particles hit the sides of the container

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5
Q

postulate four

A

we assume that the particles do not interact with each other

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6
Q

postulate five

A

-average kinetic energy is proportional to the temperature
-temp higher then particles move faster

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7
Q

ideal gas

A

-an imaginary gas that perfectly fits all the assumptions of the kinetic molecular theory
-High temps=lower pressure

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8
Q

why have real gases

A

bc non-imaginary gases take up some space and have a tiny amount of attraction they are not ideal

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8
Q

facts about ideal gases

A

-the volume is negligible
-no loss of energy between collisions
-no attractive or repulsive forces between gas molecules
-g particles are in constant random motion
-the pressure is caused by collision on the wall
-temp of g particles depends on their kinetic energy

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9
Q

things about real gases

A

-a real gas does not behave correctly according to the kinetic molecular t.
-the deviate more if there is high pressure or low temp

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10
Q

pressure

A

force per unit on an area

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11
Q

gas pressure

A

caused by the collisions between gas particles and the sides of the container

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12
Q

things that dont affect pressure

A

-mass of the particles
-size of the particles

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13
Q

things that do affect pressure

A

-number of particles
-moles

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14
Q

pfa thing

A
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16
Q

other units of pressure

A

torr- same things as mmHg
atm- the exact amount of pressure in the atm at sea level 0C
pa- pascal 1n of force per square meter of area

17
Q

order of pressures

A

1atm = 760mmHg = 760torr = 101.32kPa

18
Q

formular for farenhiet and celcuis

A

F=(1.8)C+32

19
Q

formula for kelvin

A

K=C+273.15

20
Q

kelvin temp scale

A

-used the principles that gases shrink when they cool
-using that he determined absolute zero where the gas would have no volume (no motion) 273.15

21
Q

Charles law

A
  • he discovered that O,N, H, CO2, and air expand predictably when heated
22
Q

Charles law formula