In chemistry

Chemistry

Chemistry is the science of matter, especially its chemical reactions, but also its composition, structure and properties. Chemistry is concerned with atoms and their interactions with other atoms, and particularly with the properties of chemical bonds....

, the volume fraction is defined as the volume of a constituent divided by the volume of all constituents of the mixture prior to mixing:


The SI-unit

International System of Units

The International System of Units is the modern form of the metric system and is generally a system of units of measurement devised around seven base units and the convenience of the number ten. The older metric system included several groups of units...

 is m³/m³.

Volume fraction is also called volume concentration in ideal solution

Ideal solution

In chemistry, an ideal solution or ideal mixture is a solution with thermodynamic properties analogous to those of a mixture of ideal gases. The enthalpy of solution is zero as is the volume change on mixing; the closer to zero the enthalpy of solution is, the more "ideal" the behavior of the...

s where the volumes of the constituents are additive (their sum equals the volume of the mixtures).

The sum of all volume fractions of a mixture is equal to 1:

See also

• For non-ideal mixtures, see Partial molar volume.
• For alcoholic beverage
  Alcoholic beverage
  An alcoholic beverage is a drink containing ethanol, commonly known as alcohol. Alcoholic beverages are divided into three general classes: beers, wines, and spirits. They are legally consumed in most countries, and over 100 countries have laws regulating their production, sale, and consumption...
  
  s, see alcohol by volume
  Alcohol by volume
  Alcohol by volume is a standard measure of how much alcohol is contained in an alcoholic beverage .The ABV standard is used worldwide....
  
   and Volume percent.