K a partir de ΔG°
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
K = exp(−ΔG/RT)
About this calculator
The Gibbs Free Energy Equilibrium Constant Calculator calculates the equilibrium constant of a chemical reaction from the standard free energy change (ΔG°). This is useful in chemical processes, such as organic compound synthesis and reaction stability.
The formula to calculate K is K = exp(−ΔG°/(RT)), where R is the gas constant and T is the temperature in kelvins. The value of ΔG° is the standard state free energy change of the reaction.
This calculator is useful when you need to determine the equilibrium constant of a chemical reaction to understand the direction and speed of the reaction. This is especially important in industrial processes, such as fertilizer production and drug synthesis.
Remember that the standard free energy change is a measure of the energy available to do work in a system. The smaller the value of ΔG°, the larger the value of K, indicating that the reaction is more favorable.
Frequently asked questions
What is the Gibbs free energy?
The Gibbs free energy (ΔG) is the energy available in a system to do work. It is an important measure in chemical and physical processes.
Why is the equilibrium constant important?
The equilibrium constant (K) is important because it indicates the direction and speed of the chemical reaction. A large value of K indicates that the reaction is favorable.
When to use this calculator?
Use this calculator when you need to determine the equilibrium constant of a chemical reaction to understand the direction and speed of the reaction.
What is the standard state?
The standard state (ΔG°) is the standard condition in which the Gibbs free energy is measured. It is important to calculate the equilibrium constant.
What happens if the value of ΔG° is very large?
If the value of ΔG° is very large, the value of K will be very small, indicating that the reaction is unfavorable.