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van't Hoff equation

Pronunciation: vahnt hof


  1. equation for osmotic pressure of dilute solutions.
  2. for any reaction, d(ln Keq)/d(1/T) equals -?H/R where Keq is the equilibrium constant, T the absolute temperature, R the universal gas constant, and ?H the change in enthalpy; thus, plotting ln Keq vs. 1/T allows the determination of ?Ho and ?So, where ?Ho and ?So are the standard changes in enthalpy and entropy, respectively.

See: van't Hoff law

[Jacobus H. van't Hoff]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.