Honors Chemistry Unit 2: Kinetic Theory & Gasses

pressure

the force caused by collisions between particles on a gas and a surface

pressure equation

force/area

atmosphere

the shell of air surrounding earth, extering a pressure on us at all times

What is the atmosphere composed of?

78% nitrogen, 21% oxygen, 1% other gases

atmosphereic pressure

the sum of the individual pressures of all gas particles in the atmosphere above us

atmosphereic pressure decreases with...

altitude

A barometer measures...

atmospheric pressure

Toricelli

invented the barometer (italian)

manometer measures...

gas pressure

open manometer

when the liquid is close to the atmosphere, you substract

closed manometer

when the liquid is close to the bulb, you add

mmHg

millimeters of mercury

Pa

pascal (pressure)

Torr

torr

atm

atmosphere

psi

pounds per square inch (tire gauges)

1 atm = ? kPa

101.325 kPa

1 atm = ? mmHg

760 mmHg

1 atm = ? torr

760 torr

Boyle's Law

P1V1=P2V2, constant tempurature

Charles' Law

V1/T1=V2/T2, constant pressure

Gay-Lussac's Law

P1/T1=P2/T2 (directly proportional), constant volume

Combined Gas Law

P1V1/T1=P2V2/T2

ideal gas law

- no volume

- no molecular attraction

- follows gas laws at all pressures and temperature

real gas

- has volume

- has molecules

- differs at low temp and high pressure

ideal

used to find an unknown property of a gas

combined

used to find an unknown property (in place of an IFE table)