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A colorless, crystalline compound, XeF6, that melts at 50°C to a yellow liquid, and boils at 75°C.

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Alloying

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

Free Energy Change

The indicator of spontaneity of a process at constnt T and P. If delta-G is negative, the process is spontaneous.

Absorption Spectrum

Spectrum associated with absorption of electromagnetic radiation by atoms (or other species) resulting from transitions from lower to higher energy states. An absorption spectrum is the inverse of an emission spectrum.

Half-Cell

Compartment in which the oxidation or reduction half-reaction occurs in a voltaic cell.

Conjugate Acid-base Pair

In Bronsted-Lowry terminology, a reactant and product that differ by a proton, H+.

Salicylate

A salt or ester of salicylic acid.

Heat Capacity

The amount of heat required to raise the temperature of a body (of any mass) one degree Celsius.

Designated area

An area that may be used for work with carcinogens, reproductive toxins, or substances that have a high degree of acute toxicity. A designated area may be the entire laboratory, an area of a laboratory, or a device such as a laboratory hood.

Ester

A Compound of the general formula R-C-O-R1 where R and R1 may be the same or different, and may be either aliphatic or aromatic.

Bomb Calorimeter

A device used to measure the heat transfer between system and surroundings at constant volume.