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  2. Van 't Hoff equation - Wikipedia

    en.wikipedia.org/wiki/Van_'t_Hoff_equation

    Van 't Hoff plot in mechanism study. A chemical reaction may undergo different reaction mechanisms at different temperatures. [13] In this case, a Van 't Hoff plot with two or more linear fits may be exploited. Each linear fit has a different slope and intercept, which indicates different changes in enthalpy and entropy for each distinct ...

  3. Van 't Hoff factor - Wikipedia

    en.wikipedia.org/wiki/Van_'t_Hoff_factor

    For most non-electrolytes dissolved in water, the van 't Hoff factor is essentially 1. For most ionic compounds dissolved in water, the van 't Hoff factor is equal to the number of discrete ions in a formula unit of the substance. This is true for ideal solutions only, as occasionally ion pairing occurs in solution. At a given instant a small ...

  4. Arrhenius equation - Wikipedia

    en.wikipedia.org/wiki/Arrhenius_equation

    In physical chemistry, the Arrhenius equation is a formula for the temperature dependence of reaction rates.The equation was proposed by Svante Arrhenius in 1889, based on the work of Dutch chemist Jacobus Henricus van 't Hoff who had noted in 1884 that the van 't Hoff equation for the temperature dependence of equilibrium constants suggests such a formula for the rates of both forward and ...

  5. Jacobus Henricus van 't Hoff - Wikipedia

    en.wikipedia.org/wiki/Jacobus_Henricus_van_'t_Hoff

    The third of seven children, van 't Hoff was born in Rotterdam, Netherlands, 30 August 1852. His father was Jacobus Henricus van 't Hoff Sr., a physician, and his mother was Alida Kolff van 't Hoff. [10] From a young age, he was interested in science and nature, and frequently took part in botanical excursions.

  6. Equilibrium constant - Wikipedia

    en.wikipedia.org/wiki/Equilibrium_constant

    This equation can be used to calculate the value of log K at a temperature, T 2, knowing the value at temperature T 1. The van 't Hoff equation also shows that, for an exothermic reaction (<), when temperature increases K decreases and when temperature decreases K increases, in accordance with Le Chatelier's principle.

  7. Solubility - Wikipedia

    en.wikipedia.org/wiki/Solubility

    The van 't Hoff equation relates the change of solubility equilibrium constant (K sp) to temperature change and to reaction enthalpy change. For most solids and liquids, their solubility increases with temperature because their dissolution reaction is endothermic (ΔH > 0). [12]

  8. Cryoscopic constant - Wikipedia

    en.wikipedia.org/wiki/Cryoscopic_constant

    i is the van ‘t Hoff factor, the number of particles the solute splits into or forms when dissolved; b is the molality of the solution. Through cryoscopy, a known constant can be used to calculate an unknown molar mass. The term "cryoscopy" means "freezing measurement" in Greek.

  9. List of dimensionless quantities - Wikipedia

    en.wikipedia.org/wiki/List_of_dimensionless...

    van 't Hoff factor: i = + quantitative analysis (K f and K b) Wagner number: Wa = electrochemistry (ratio of kinetic polarization resistance to solution ohmic resistance in an electrochemical cell) [4]