Editing Ideal solution (section)

{{Short description|Solution exhibiting thermodynamic properties analogous to an ideal gas}}
An '''ideal solution''' or '''ideal mixture''' is a [[Solution (chemistry)|solution]] that exhibits thermodynamic properties analogous to those of a mixture of [[ideal gas]]es.<ref name=epcp>{{cite book |last1=Felder |first1=Richard M. |last2=Rousseau |first2=Ronald W. |last3=Bullard |first3=Lisa G.|title=Elementary Principles of Chemical Processes |year=2005 |url=https://archive.org/details/ElementaryPrinciplesOfChemicalProcessesThirdEdition|publisher=Wiley|isbn=978-0471687573|edition=3|page=293}}</ref><ref name=Atkins/> The [[enthalpy of mixing]] is zero<ref>''A to Z of Thermodynamics'' Pierre Perrot {{ISBN|0-19-856556-9}}</ref> as is the volume change on mixing.<ref name=Atkins/> The [[vapor pressure]]s of all components obey [[Raoult's law]] across the entire range of concentrations,<ref name=Atkins/> and the [[activity coefficient]] (which measures deviation from ideality) is equal to one for each component.<ref>{{GoldBookRef|title=ideal mixture|file=I02938}}</ref>

The concept of an ideal solution is fundamental to both [[thermodynamics]] and [[chemical thermodynamics]] and their applications, such as the explanation of [[colligative properties]].