Formula
This calculator uses the equation below. Use it as a quick reference when checking setup before solving.
ln(k2/k1) = -(delta_H/R) * (1/t2 - 1/t1)Physical Chemistry
Vant Hoff Calculator
Solve one variable in ln(k2/k1) = -(delta_H/R) * (1/t2 - 1/t1) for equilibrium constant temperature dependence.
ln(k2/k1) = -(delta_H/R) * (1/t2 - 1/t1)
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Leave a nullable field blank to solve for it.
Variable glossary
K1 (k1)
Initial equilibrium constant (must be > 0). Set to null to solve.
K2 (k2)
Final equilibrium constant (must be > 0). Set to null to solve.
Delta H (delta_h)
Reaction enthalpy change (J/mol). Set to null to solve.
T1 (t1)
Initial temperature in kelvin (K). Set to null to solve.
T2 (t2)
Final temperature in kelvin (K). Set to null to solve.
R (R)
Gas constant in J/(mol*K), default 8.31446261815324.
Frequently Asked Questions
What does the Vant Hoff calculator solve?
It solves Vant Hoff problems in physical chemistry using your provided inputs and computes unknown values when nullable fields are left blank.
Do I need to convert units before using this tool?
Use the unit toggles where available (for example K/C and L/mL). ChemGenius converts values to the calculator's base units automatically before solving.
Can I save this result in my workflow?
Yes. After computing a result, you can continue into ChemGenius workflows like protocol drafting or notes to keep your calculation context attached to downstream work.