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The direct solidification of a vapor by cooling, the reverse of sublimation.

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Displacement Reactions

Reactions in which one element displaces another from a compound.

 

Boiling Point Elevation

The increase in the boiling point of a solvent caused by the dissolution of a nonvolatile solute.

Specific Rate Constant

An experimentally determined (proportionality) constant, which is different for different reactions and which changes only with temperature, k in the rate-law expression: Rate = k [A] x [B]v.

Curie (Ci)

The basic unit used to describe the intensity of radioactivity in a sample of material. One curie equals 37 billion disintegrations per second or approximately the amount of radioactivty given off by 1 gram of radium.

Alkyl Group

A group of atoms derived from an alkane by the removal of one hydrogen atom.

Autoionization

An ionization reaction between identical molecules.

Reversible Reaction

Reactions that do not go to completion and occur in both the forward and reverse direction.

Primary Voltaic Cells

Voltaic cells that cannot be recharged, no further chemical reaction is possible once the reactants are consumed.

Artificial Transmutation

An artificially induced nuclear reaction caused by the bombardment of a nucleus with subatomic particiles or small nucei.

Ostwald Process

A process for the industrial production of nitrogen oxide and nitric acid from ammonia and oxygen.