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Dühring's rule states that a linear relationship exists between the temperatures at which two solutions exert the same vapour pressure.[1][2] The rule is often used to compare a pure liquid and a solution at a given concentration.

Dühring's plot is a graphical representation of such a relationship, typically with the pure liquid's boiling point along the x-axis and the mixture's boiling point along the y-axis; each line of the graph represents a constant concentration.

Dühring's plot for boiling point of NaCl solutions[1]

See alsoEdit


  1. ^ a b Earle, Richard L.; Earle, M. D. (2004). "Evaporation". Unit Operations in Food Processing. The New Zealand Institute of Food Science & Technology (Inc.). Retrieved March 15, 2009.
  2. ^ Price, R. M. (2003). "Evaporation". RMP Lecture Notes. Christian Brothers University. Retrieved March 15, 2009.