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Water containing deuterium, a heavy isotope of hydrogen.

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Degenerate

Of the same energy.

Heterogeneous Mixture

A mixture that does not have uniform composition and properties throughout.

Calorimeter

A device used to measure the heat transfer between system and surroundings.

Energy

The capacity to do work or transfer heat.

Salicylaldehyde

An oily, slightly water-soluble liquid, C7H6O2, having an almondlike odor: used chiefly in perfumery and in the synthesis of coumarin.

Geometrical Isomers

Compounds with different arrangements of groups on either side of a bond with restricted rotation, such as a double bond or a single bond in a ring, for example cis-trans isomers of certain alkenes. Stereoisomers that are not mirror images of each other, also known as position isomers.

Percentage Ionization

The percentage of the weak electrolyte that ionizes in a solution of given concentration.

Periodic Table of Elements

An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.

Amphiprotism

Ability of a substance to exhibit amphiprotism by accepting donated protons.

Flammable

A liquid as defined by NFPD and DOT as having a flash point below 37.8°C (100°F).