Look up: azeotrope

1. 
   Azeotrope
   A solution that does not change composition when distilled. For example, if a 95% (w/w) ethanol solution in water is boiled, the vapour produced also is 95% ethanol- and it is not possible to obtain higher percentages of ethanol by distillation.
   Found on http://www.diracdelta.co.uk/science/sour
   
   
2. 
   azeotrope
   azeotropic mixture; azeotropy. A solution that does not change composition when distilled. For example, if a 95% (w/w) ethanol solution in water is boilled, the vapor produced also is 95% ethanol- and it is not possible to obtain higher percentages of ethanol by distillation.
   Found on http://antoine.frostburg.edu/chem/senese
   
   
3. 
   azeotrope
   Azeotrope is a mixture of two liquids that boils at constant composition, i.e. the composition of the vapour is the same as that of the liquid. Azeotropes occur because of deviations in Raoult's law leading to a maximum or minimum in the boiling point - composition diagram. The composition of an azeotrope depends on the pressure.
   Found on http://www.ktf-split.hr/periodni/en/abc/
   
   
4. 
   Azeotrope
   A mixture of two or more compounds which has a constant boiling point. The composition of the vapour above the azeotropic mixture has the same relative concentrations of compounds as does the boiling liquid. Azeotropic mixtures cannot be separated by fractional distillation
   Found on http://www.fire.org.uk/glossary.htm
   
   
5. 
   azeotrope
   A ‘constant boiling mixture` of two or more solvents, whose vapour has the same composition as the liquid, so that the formulation cannot be altered by distillation. Constant boiling mixtures usually have a minimum boiling point, lower than that of either of its constituents. Often azeotropes used for cleaning combine polar and non-polar solvents ...
   Found on http://www.ami.ac.uk/courses/topics/0100
   
   
6. 
   azeotrope
   a mixture of liquids whose vapour and liquid phases in equilibrium have identical compositions,the boiling point is constant Category: Mechanical engineering
   Found on http://www.mijnwoordenboek.nl/definition
   
   
7. 
   azeotrope
   A mixture of two or more liquids that boils without change in proportion of the liquids, either in the liquid or the vapor phase; e.g., 95% ethanol (actually 94.9% by volume, the rest being water). ... Origin: G. A-priv. + zeein, to boil, + tropos, a turning ... (05 Mar 2000) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
8. 
   Azeotrope
   An `azeotrope` is a mixture of two or more pure compounds (chemicals) in such a ratio that its composition cannot be changed by simple distillation. This is because when an azeotrope is boiled, the resulting vapor has the same ratio of constituents as the original mixture of liquids. Because composition is unchanged by boiling, azeotropes are also known as `constant boiling mixtures` (especially in older texts). The word azeotrope comes from the ...
   Found on http://en.wikipedia.org/wiki/Azeotrope
   
   
9. 
   azeotrope
   (a´ze-o-trōp″) a mixture of two substances that has a constant boiling point and cannot be separated by fractional distillation. adj., azeotrop´ic., adj.
   Found on http://www.mercksource.com/pp/us/cns/cns
   
   
10. 
    azeotrope
    in chemistry, a mixture of liquids that has a constant boiling point because the vapour has the same composition as the liquid mixture. The boiling ... [2 related articles]
    Found on http://www.britannica.com/eb/a-z/a/133
    
    
11. 
    azeotrope
    A mixture of two or more liquids that boils without a change in proportion of the substances either in the liquid or the vapor phase; e.g., 95% ethanol (actually 94.9% by volume, the rest being water). [G. a- priv. + ze, to boil, + tropos, a turning]
    Found on http://www.stedmans.com/section.cfm/45