Critical Micelle Concentration (CMC)Chemistry

Critical Micelle Concentration (CMC) & Thermodynamics of Micellization Calculator

Calculate Gibbs free energy of micellization (ΔG°mic), surfactant mole fraction at CMC, and thermodynamic spontaneity for nonionic and ionic surfactant systems.

Calculated Result

Gibbs Free Energy of Micellization (ΔG°mic)

0kJ/mol

Calculator Inputs

mm
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Gibbs Free Energy of Micellization (ΔG°mic)

0kJ/mol

Surfactant Mole Fraction (X_CMC)

0 -

Micellization Spontaneity Driving Force

Micelle ΔG°
0 kJ/mol(0%)

Standard colloid, surface chemistry, and pharmaceutical formulation tool for surfactant self-assembly.

Calculation Methodology

Phase Separation Thermodynamic Model: For non-ionic surfactants: ΔG°mic = R * T * ln(X_CMC). For ionic surfactants: ΔG°mic = (1 + β) * R * T * ln(X_CMC). Where X_CMC ≈ CMC(mol/L) / 55.55, R = 8.314 J/(mol K), T in Kelvin, and β is counterion binding degree.

Frequently Asked Questions

It is the threshold concentration above which monomeric surfactant saturation occurs at the air-water interface, driving surplus monomers to self-assemble into hydrophobic-core spherical aggregates (micelles).

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