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The drawing of a liquid up the inside of a small-bore tube when adhesive forces exceed cohesive forces, or the depression of the surface of the liquid when cohesive forces exceed the adhesive forces.

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Homogeneous Catalyst

A catalyst that exists in the same phase (solid, liquid or gas) as the reactants. The process is called Homogeneous Catalysis.

DP number

The degree of polymerization, the average number of monomer units per polymer unit.

Vapor

A gas formed by boiling or evaporating a liquid.

Effective Molality

The sum of the molalities of all solute particles in a solution.

Substance

Any kind of matter all specimens of which have the same chemical composition and physical properties.

 

Fossil Fuels

Substances consisting largely of hydrocarbons, derived from decay of organic materials under geological conditions of high pressure and temperature (metamorphism) include coal, petroleum, natural gas, peat and oil shale.  For further information see Fuel Chemistry

Heat of Vaporization

The amount of heat required to vaporize one gram of a liquid at its boiling point with no change in temperature. Usually expressed in J/g. The molar heat of vaporization is the amount of heat required to vaporize one mole of liquid at its boiling point with no change in temperature and usually expressed ion kJ/mol.

Formula Unit

The smallest repeating unit of a substance. The molecule for nonionic substances

Basic Anhydride

The oxide of a metal that reacts with water to form a base.

Composition Stoichiometry

Descibes the quantitative (mass) relationships among elements in compounds.