Editing Raoult's law (section)

===Positive deviation===
[[File:Raoult's and Henry's laws en 5000x5000 256 cols.png|thumb|Positive deviation from Raoult's law]]
When the adhesion is weaker than cohesion, which is quite common, the liquid particles escape the solution more easily that increases the vapor pressure and leads to a positive deviation.

If the deviation is large, then the vapor pressure curve shows a maximum at a particular composition and forms a positive azeotrope (low-boiling mixture). Some mixtures in which this happens are (1) [[ethanol]] and [[water]], (2) [[benzene]] and [[methanol]], (3) [[carbon disulfide]] and [[acetone]], (4) [[chloroform]] and ethanol, and (5) [[glycine]] and water. When these pairs of components are mixed, the process is endothermic as weaker intermolecular interactions are formed so that Δ<sub>mix</sub>''H'' is positive.