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The entropy of a hypothetical pure, perfect, crystalline sustance at absolute zero temperature is zero.

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Specific Heat

The amount of heat required to raise the temperature of one gram of substance one degree Celsius.

Condensation

Liquefaction of vapor.

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.

Polarization

The buildup of a product of oxidation or a reduction of an electrode, preventing further reaction.

Effective Collisons

Collision between molecules resulting in a reaction, one in which the molecules collide with proper relative orientations and sufficient energy to react.

 

Evaporization

Vaporization of a liquid below its boiling point.

Alloying

Mixing of metal with other substances (usually other metals) to modify its properties.

Metal

An element below and to the left of the stepwise division (metalloids) in the upper right corner of the periodic table, about 80% of the known elements are metals.

Raoult's Law

The vapor pressure of a solvent in an ideal solution decreases as its mole fraction decreases.

Free Radical

A highly reactive chemical species carrying no charge and having a single unpaired electron in an orbital.