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A unit of pressure, the pressure that will support a column of mercury 760 mm high at 0 °C.

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Heat

A form of energy that flows between two samples of matter because of their differences in temperature.

Amphoterism

The ability to react with both acids and bases.Ability of substance to act as either an acid or a base.

Avogadro's Law

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

Freezing Point Depression

The decrease in the freezing point of a solvent caused by the presence of a solute.ing Point

Moderator

A substance such as hydrogen, deuterium, oxygen or paraffin capable of slowing fast nuetrons upon collision.

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.

Band of Stability

Band containing nonradioactive nuclides in a plot of number of neutrons versus atomic number.

Exothermic

Describes processes that release heat energy.

Joule

A unit of energy in the SI system. One joule is 1 kg. m2/s2 which is also 0.2390 calorie.

Coordinate Covalent Bond

A covalent bond in which both shared electrons are donated by the same atom, a bond between a Lewis base and a Lewis acid.

Fast Neutron

A neutron ejected at high kinetic energy in a nuclear reaction.

Unsaturated Hydrocarbons

Hydrocarbons that contain double or triple carbon-carbon bonds.

Chemical Equation

Description of a chemical reaction by placing the formulas of the reactants on the left and the formulas of products on the right of an arrow.

Effective Molality

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

Theoretical Yield

Maximum amount of a specified product that could be obtained from specified amounts of reactants, assuming complete consumption of limiting reactant according to only one reaction and complete recovery of product.

Water Equivalent

The amount of water that would absorb the same amount of heat as the calorimeter per degree temperature increase.

Thermodynamics

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

Polymerization

The combination of many small molecules to form large molecules.

Polyene

A compound that contains more than one double bond per molecule.

Titration

A Procedure in which one solution is added to another solution until the chemical reaction between the two solutes is complete, the concentration of one solution is known and that of the other is unknown.