Liquid Phase Coefficient Calculator

The Liquid Phase Coefficient, also known as the activity coefficient, is a measure of the deviation of a solution from ideal behavior. It is relevant in the fields of physics and physical chemistry, particularly in thermodynamics and chemical engineering. It provides essential insights into the interaction of molecules in a solution, allowing us to understand and predict the behavior of real solutions.

Liquid Phase Coefficient Calculator
cm3 /g-Mol
Liquid Phase Coefficient Calculator Results
Diffusion Coefficient of Liquid Phase = cm2 / S

Please provide a rating, it takes seconds and helps us to keep this resource free for all to use

[ 7 Votes ]

Example Formula

The formula to calculate the liquid phase coefficient (γ) in dilute solutions can be given by:

γ = φB × MB × T / (ηB × VA)


  1. γ is the liquid phase coefficient.
  2. φB is the association factor of solvent B.
  3. MB is the molecular weight of solvent B.
  4. T is the absolute temperature (in Kelvin).
  5. ηB is the viscosity of solvent B.
  6. VA is the molal volume of solute A.

Who wrote/refined the formula

The concept of the activity coefficient was developed over time by various scientists in the field of physical chemistry and thermodynamics. It was Lewis who in 1907 introduced the term "activity" and defined the activity coefficient.

Real Life Application

The concept of the liquid phase coefficient is used widely in the field of chemical engineering and industrial processes. For example, in the design of distillation columns and in the synthesis of chemical reactions, where it's crucial to predict how components in a solution will behave.

Key individuals in the discipline

Gilbert N. Lewis, an American physical chemist, was known for his work on chemical thermodynamics. His introduction of the term "activity" and the definition of the activity coefficient have been a significant influence in this field.

Interesting Facts

  1. The concept of the activity coefficient is crucial in environmental chemistry. For instance, it allows scientists to understand how pollutants dissolve and spread in water bodies.
  2. It has a significant impact on the production of various consumer products, such as food and beverages, where flavor extraction and infusion are concerned.
  3. Understanding the liquid phase coefficient has contributed to advancements in the pharmaceutical industry, where it helps predict the behavior of various components in a drug solution.


The concept of the liquid phase coefficient or the activity coefficient is essential in many scientific and industrial applications. It provides insights into non-ideal solution behavior, allowing for the optimization of various processes in fields ranging from chemical engineering to environmental science and pharmaceuticals. Understanding this concept is fundamental to mastering thermodynamics and physical chemistry.

Physics Calculators

You may also find the following Physics calculators useful.