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A technique for observing the temperature, direction, and magnitude of thermally induced transitions in a material by heating/cooling a sample and comparing its temperature with that of an inert reference material under similar conditions.

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Explosive

A chemical or compound that causes a sudden, almost instantaneous release or pressure, gas, heat and light when subjected to sudden shock, pressure, high temperature or applied potential.

Primary Voltaic Cells

Voltaic cells that cannot be recharged, no further chemical reaction is possible once the reactants are consumed.

Linear Accelerator

A device used for accelerating charged particles along a straight line path.

Insulator

Poor electric and heat conductor.

Distilland

The material in a distillation apparatus that is to be distilled.

Endothermic

Describes processes that absorb heat energy.

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.

Valence Bond Theory

Assumes that covalent bonds are formed when atomic orbitals on different atoms overlap and the electrons are shared.

Electroplating

Plating a metal onto a (cathodic) surface by electrolysis.

Phenol

Hydrocarbon derivative containing an [OH] group bound to an aromatic raing.