# 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 T

_{1}and T

_{2}at which the equilibrium constants are KP

_{1}and KP

_{2}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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