Chemistry 11.1

Pressure (P) is defined as

the force per unit area on a surface.

Gas pressure is caused

collisions of the gas molecules with each other and with surfaces with which they come into contact.

The pressure exerted by a gas depends on

volume, temperature, and the number of molecules present.

the greater the number of collisions of gas molecules

the higher the pressure

pressure is force

per unit area

the greater the force

the greater the pressure

pressure depends on

force and area

atmospheric pressure

is the pressure exerted on Earth due to gases in the atmosphere

unit of pressure

millmeters of mercury (mmHg)

one atmosphere of pressure (atm)

is equivalent to 760 mmHg

pressure is expressed in

pascals

1atm es equal to

101.325kPa

pressure of each gas in a mixture is called

partical pressure

daltons law of partical pressure

states that the total pressure of a gas mixture is the sum of the partial pressures of the component gases.

dalton law of partical pressure equation

Patm + Pgas + Ph2O

atm is also

torr