Van’t Hoff Equation

Van’t Hoff Equation

Van’t Hoff equation relates the chemical equilibrium constant and temperature by thermodynamic relation of Gibbs-Helmholtz free energy equation. The Van't Hoff equation has been widely utilized to explore the changes in state functions in a thermodynamic system.
According to Vant Hoff, at a given temperature, the equilibrium constant of the chemical reaction remains unchanged, but change considerably when the temperature is changed. It can be derived thermodynamically from Gibbs – Helmholtz free energy equation.
If the equation-3 is integrated between two temperatures T₁ and T₂ at which the equilibrium constants are KP₁ and KP₂ respectively assuming that ΔH^o remains constant over a range of temperature.
i.e.

Van't Hoff Isotherm

Van't Hoff Isochore

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