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Van 't Hoff equation
The van 't Hoff equation in chemical thermodynamics relates the change in temperature (T) to the change in the equilibrium constant (K) given the enthalpy change (ΔH). The equation was first derived by Jacobus Henricus van 't Hoff.
Additional recommended knowledge
If the enthalpy change of reaction is assumed to be constant with temperature, the definite integral of this differential equation between temperatures T1 and T2 is given by
it follows that
Therefore, a plot of the natural logarithm of the equilibrium constant versus the reciprocal temperature gives a straight line. The slope of the line is equal to minus the standard enthalpy change divided by the gas constant, ΔH
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Van_'t_Hoff_equation". A list of authors is available in Wikipedia.|