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A change in which a substance changes from one physical state to another but no substances with different composition are formed. Example Gas to Liquid - Solid.

 

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Heat of Vaporization

The amount of heat required to vaporize one gram of a liquid at its boiling point with no change in temperature. Usually expressed in J/g. The molar heat of vaporization is the amount of heat required to vaporize one mole of liquid at its boiling point with no change in temperature and usually expressed ion kJ/mol.

Distillate

The material in a distillation apparatus that is collected in the receiver.

 

Copper

Discovered : known to ancient civilisations
Origin : The name is derived from 'Cuprum', the Latin name for Cyprus.

Hund's Rule

All orbitals of a given sublevel must be occupied by single electrons before pairing begins.

Where is ozone used?

Ozone is widely used in various areas of our life. It is used in medicine, in industry, in everyday life.

Homogeneous Mixture

A mixture which has uniform composition and properties throughout.

Hydride

A binary compound of hydrogen.

 

Percent Purity

The percent of a specified compound or element in an impure sample.

Radioactivity

The spontaneous disintegration of atomic nuclei.

Antibonding Orbital

A molecular orbital higher in energy than any of the atomic orbitals from which it is derived, lends instability to a molecule or ion when populated with electrons, denoted with a star (*) superscript or symbol.