basic

Gibbs Energy of Mixing for an Ideal Solution Calculator

ΔG_mix = nRT Σ xᵢ ln xᵢ — always negative for ideal mixing.

Calculates the Gibbs energy of mixing ΔG_mix = nRT(x₁ ln x₁ + x₂ ln x₂) for a binary ideal solution, and the entropy of mixing ΔS_mix = −R Σ xᵢ ln xᵢ.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

mol
K

Results

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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

ΔG_mix = nRT(x₁ ln x₁ + x₂ ln x₂)

In depth

Calculates the Gibbs energy of mixing ΔG_mix = nRT(x₁ ln x₁ + x₂ ln x₂) for a binary ideal solution, and the entropy of mixing ΔS_mix = −R Σ xᵢ ln xᵢ.