Activity of a Component of Ideal Mixture
| Formula / Notation | a_i = x_i (ideal); μ_i = μ°_i + RT ln(a_i) |
|---|---|
| Also Known As | Thermodynamic activity; relative activity; a_i; fugacity (for gases) |
What is Activity of a Component of Ideal Mixture?
The activity of a component in an ideal mixture equals its mole fraction (a_i = x_i). Activity is a dimensionless quantity that expresses the effective concentration of a species in a mixture, accounting for non-ideal behaviour. In ideal solutions, Raoult's law holds and the activity coefficient γ_i = 1.
Formula & Notation
Other Names / Synonyms: Thermodynamic activity; relative activity; a_i; fugacity (for gases)
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
The activity of a component in an ideal mixture equals its mole fraction (a_i = x_i). Activity is a dimensionless quantity that expresses the effective concentration of a species in a mixture, accounting for non-ideal behaviour. In ideal solutions, Raoult's law holds and the activity coefficient γ_i = 1.
Thermodynamic calculations for non-ideal solutions; calculating equilibrium constants for real systems; vapour pressure calculations using Raoult's law; electrochemistry and Nernst equation corrections
No direct hazard — a thermodynamic property concept.
The formula or notation for Activity of a Component of Ideal Mixture is: a_i = x_i (ideal); μ_i = μ°_i + RT ln(a_i)