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At the same temperature and pressure, equal volumes of all gases contain the same number of molecules.

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Fluorescence

Absorption of high energy radiation by a substance and subsequent emission of visible light.

Equivalence Point

The point at which chemically equivalent amounts of reactants have reacted.

Flash Point

The temperature at which a liquid will yield enough flamable vapour to ignite. There are various recognized industrial testing methods, therefore the method used must be stated.

pH

Negative logarithm of the concentration (mol/L) of the H3O+[H+] ion, scale is commonly used over a range 0 to 14.

Endothermicity

The absorption of heat by a system as the process occurs.

Thermodynamics

The study of the energy transfers accompanying physical and chemical processes.

Amino Acid

Compound containing both an amino and a carboxylic acid group.The --NH2 group.

Heat of Fusion

The amount of heat required to melt one gram of solid at its melting point with no change in temperature. Usually expressed in J/g. The molar heat of fusion is the amount of heat required to melt one mole of a solid at its melting point with no change in temperature and is usually expressed in kJ/mol.

Oxidation

An algebraic increase in the oxidation number, may correspond to a loss of electrons.

Polymer

A large molecule consisting of chains or rings of linked monomer units, usually characterized by high melting and boiling points.