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The pentosan occurring in woody tissue that hydrolyzes to xylose: used as a source of furfural.

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Photoelectric Effect

Emission of an electron from the surface of a metal caused by impinging electromagnetic radiation of certain minimum energy, current increases with increasing intensity of radiation.

 

Phase Diagram

Diagram that shows equilibrium temperature-pressure relationships for different phases of a substance.

Ether

Compound in which an oxygen atom is bonded to two alkyl or two aryl groups, or one alkyl and one aryl group.

Surface Tension

It is the force in dynes acting along the surface of the liquid 1cm in length and perpendicular to it.

Mass Deficiency

The amount of matter that would be converted into energy if an atom were formed from constituent particles.

Dispersed Phase

The solute-like species in a colloid.

Displacement Reactions

Reactions in which one element displaces another from a compound.

 

Free Energy, Gibbs Free Energy

The thermodynamic state function of a system that indicates the amount of energy available for the system to do useful work at constant T and P.

Meniscus

The shape assumed by the surface of a liquid in a cylindrical container.

Electron

A subatomic particle having a mass of 0.00054858 amu and a charge of 1-.