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Any of three oily, colorless, water-insoluble, flammable, toxic, isomeric liquids, C8H10, of the benzene series, obtained mostly from coal tar: used chiefly in the manufacture of dyes.

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Standard Entropy

The absolute entropy of a substance in its standard state at 298 K.

Matter

Anything that has mass and occupies space.

Phosphoric Acid

H3P04, Colorless liquid or rhombic crystals, decomposes before it will boil. Used mostly in the metal etchant. Used in cleaning operations to remove encrusted surface matter and mineral scale found on metal equipment such as boilers and steam producing equipment. Also used to brighten metals and remove rust.

Carbanion

An organic ion carrying a negative charge on a carbon atom.

Hard Water

Water containing Fe3+, Ca2+, and Mg2+ ions, which forms precipates with soap.

Boyle's Law

At constant temperature the volume occupied by a definite mass of a gas is inversely proportional to the applied pressure.

Ampere

Unit of electrical current, one ampere equals one coulomb per second.

 

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.

Alpha (a) Particle

Helium ion with 2+ charge, an assembly of two protons and two neutrons.

Hydride

A binary compound of hydrogen.