A chemical substance consisting of two or more pure substances (called mixture components or mixture ingredient) with chemical bonding between components being weaker than that of between molecules of components.
A list of all chemical substances constituting a mixture is called Mixture composition.
The chemical properties of mixtures may differ from those of any constituent components.
Unlike pure substances the mixtures in a state of Thermodynamic equilibrium may see various phases occupy a continuous area in PT Diagram (see for example Vapour Liquid Equilibrium).
In petroleum industry the most popular mixtures are hydrocarbons and water (H2O).
A mixture in a fluid state (liquid, gas or supercritical fluid) is called a fluid mixture.
See Also
Natural Science / Chemistry / Chemical Substance
[ Pure substance ] [ Fluid Mixture ]
[ Thermodynamic equilibrium ][ Vapour Liquid Equilibrium (VLE) ]