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Refers to the separation of charge between two covalently bonded atoms.

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Emission Spectrum

Spectrum associated with emission of electromagnetic radiation by atoms (or other species) resulting from electronic transitions from higher to lower energy states.

 

Ostwald Process

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

Absolute Entropy (of a substance)

The increase in the entropy of a substance as it goes from a perfectly ordered crystalline form at 0 °K (where its entropy is zero) to the temperature in question.

Entropy is a measure of the “dilution” of thermal energy.

Free Energy Change

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

Equilibrium Constant

A quantity that characterizes the position of equilibrium for a reversible reaction, its magnitude is equal to the mass action expression at equilibrium. K varies with temperature.

Explosive

A chemical or compound that causes a sudden, almost instantaneous release or pressure, gas, heat and light when subjected to sudden shock, pressure, high temperature or applied potential.

Unsaturated Hydrocarbons

Hydrocarbons that contain double or triple carbon-carbon bonds.

Neutron

A neutral subatomic particle having a mass of 1.0087 amu.

Law of Conservation of Energy

Energy cannot be created or destroyed, it may be changed from one form to another.

Spectator Ions

Ions in a solution that do not participate in a chemical reaction.