Free energy change to equilibrium constant
Type a value in kJ/mol to get it in K instantly.
990.4K
That's 990× as favorable as a balanced reaction, while a favorable reaction is 1.01× more favorable. At equilibrium about 99.9% has reacted.
Convert the other way: K to kJ/mol
What it means
Which way does it go?
Values are at 25 °C. Free energy scales with temperature, so the same K means a different ΔG° in a furnace.
The math
How to convert kJ/mol to K
The constant and the free energy are the same statement: ΔG° = −RT ln K, which at 25 °C is ΔG° = −5.708 × log₁₀K kJ/mol.
Example: -17.1 kJ/mol = 990.354 K.
Every unit
Your equilibrium in every unit
Tables
kJ/mol to K conversion table
| kJ/mol | K |
|---|---|
| -68.5 kJ/mol | 1.002×10¹² K |
| -57.1 kJ/mol | 1.008×10¹⁰ K |
| -34.2 kJ/mol | 980,801 K |
| -17.1 kJ/mol | 990.354 K |
| -5.71 kJ/mol | 10.008 K |
| 0 kJ/mol | 1 K |
| 5.71 kJ/mol | 0.0999197 K |
| 17.1 kJ/mol | 0.00100974 K |
| 34.2 kJ/mol | 1.02×10⁻⁶ K |
| 57.1 kJ/mol | 9.92×10⁻¹¹ K |
K to kJ/mol conversion table
| K | kJ/mol |
|---|---|
| 1×10⁻¹⁰ K | 57.0801 kJ/mol |
| 1×10⁻⁶ K | 34.2481 kJ/mol |
| 0.001 K | 17.124 kJ/mol |
| 0.1 K | 5.70801 kJ/mol |
| 1 K | 0 kJ/mol |
| 10 K | -5.70801 kJ/mol |
| 1,000 K | -17.124 kJ/mol |
| 1,000,000 K | -34.2481 kJ/mol |
| 1×10¹⁰ K | -57.0801 kJ/mol |
| 1×10¹² K | -68.4961 kJ/mol |
Quick answers
Quick answers
- How many K is 1 kJ/mol?
- 1 kJ/mol is 0.668048 K.
- How many K is 10 kJ/mol?
- 10 kJ/mol is 0.0177042 K.
- How many K is -17.1 kJ/mol?
- -17.1 kJ/mol is 990.354 K.
The units
About these units
Free energy change (kJ/mol)
ΔG° at 25 °C. Negative means the reaction goes forward.
Equilibrium constant (K)
Products over reactants at equilibrium.
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