Sec physical chemistry

Any thing that has mass and takes up space

Is the name scientists have given to everything that you can touch or see or feel

The study of matter and the change it undergoes

Refers to the parts or component of a sample of matter and their relative proportions.

Any characteristic that can be used to describe or identify matter

1) by physical state as a solid ,liquid,or gas
2) by its chemical constitution as an element ,compound,or mixture

Solid : particles close together and organized
Liquid: particles are close together but disorganized
Gas: particles far apart and disorganized

Definite shap and volume
Particles close together , fixed
Particles move very slowly ( vibrate)
Strong intermolecular forces

Indefinite shape definite volume
Take the shape of container
Particles are close together, but mobile
Particles move slowly
Weaker intermolecular forces

Indefinite shape and volume
Take the shape and volume of container
Particles are far apart and move fast
Weakest intermolecular forces

Is a homogenous mixture of two or more substances whose relative amounts can vary within certain limits

The solute is are the substance present in the smaller amounts
The solvent is the substance present in the larger amount

Air (O in N)

Water that dissolves in air to form Humidity

Smoke

Wine (ethanol in water)
Vinegar( acetic acid in water)

(Salt in water),(table sugar in water)

Adsorption of gases eg. charcoal filter (poisonous gases in carbon), H adsorbed on pallidium

Dental amalgum for filing ( liquid mercury in solid sliver)

Alloys (Ag in Au) , steel ( carbon in iron)

The sum of the atomic weight ( mass) of the elements in a compound

There’s one carbon atom and 4 hydrogen atoms. The atomic weight of carbon is 12 and the atomic weight of hydrogen is 1 Adding them up we have 12+(4*1)=16

One mole can be viewed as a packet of atoms or molecules (6.02*10 to the power 23 atoms or molecules; this number is known as Avogadros constant).

It was found that one mole of any gas occupies a volume of 22.4 liters at standard temperature and pressure (STP)

The quantity 22.4L

NTP= 20c and 1 bar) the molar volume equals 24 liters