How to use the free energy change from concentration change calculator
Find the Gibbs energy change when the concentration of a solute is changed at a set temperature. Enter initial concentration, final concentration, temperature in the fields above; the free energy change for concentration change, free energy change are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “chemical potential change”, “RT ln concentration ratio”, “free energy of concentration change”, “calculate free energy change from concentration change”, “find free energy change for concentration change”.
Formula
Variables
- c1 — Initial concentration (M)
- c2 — Final concentration (M)
- T — Temperature (K)
Worked example
With initial concentration = 0.1 M, final concentration = 1 M, temperature = 298.15 K, the calculator gives free energy change for concentration change ≈ 5,708.01 J/mol; free energy change ≈ 5.70801 kJ/mol.
Frequently asked questions
What is the free energy change from concentration change calculator used for?
Find the Gibbs energy change when the concentration of a solute is changed at a set temperature. It helps with questions such as “chemical potential change”, “RT ln concentration ratio”, “free energy of concentration change”.
What is the formula for the free energy change from concentration change calculation?
Free energy change for concentration change (J/mol) = RGAS × T × ln(c2 / c1). Free energy change (kJ/mol) = [Free energy change for concentration change] / 1000. Here c1 is initial concentration (M), c2 is final concentration (M), T is temperature (K).
What inputs do I need for the free energy change from concentration change calculator?
You need initial concentration in M, final concentration in M, temperature in K. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the free energy change from concentration change calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the free energy change from concentration change result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.