Equations · equation
Van 't Hoff Equation
Chemical Thermodynamics · 1884
- Equation
- d(ln K)/dT = ΔH° / (RT²)
- Field
- Chemical Thermodynamics
- Named After
- Jacobus van 't Hoff
- Year
- 1884
Symbols
K equilibrium constant · T absolute temperature · ΔH° standard enthalpy of reaction · R gas constant · heat-releasing reactions (ΔH° < 0) lose ground as T rises
Significance
Heat a reaction that gives off heat and equilibrium retreats; heat one that absorbs heat and it advances — Le Chatelier's principle made quantitative. It's why the Haber process runs hot for speed but not too hot for yield, feeding half the world's nitrogen. First chemistry Nobel, 1901.
Referenced by
constant
element
equation
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