What is antoine equation?

Antoine equation is a vapor pressure equation that relates the vapor pressure of a pure substance to its temperature. It is named after the French chemist Louis Charles Antoine, who first developed the equation in the 19th century.

The Antoine equation is typically written in the form:

log10(P) = A - (B / (T + C))

Where P is the vapor pressure of the substance in mmHg, T is the temperature in degrees Celsius, and A, B, and C are constants specific to the substance being studied.

The Antoine equation is commonly used in the field of thermodynamics and chemical engineering to predict the vapor pressure of a substance at different temperatures. It is particularly useful in the design and operation of distillation processes, where knowledge of vapor pressures is essential for separating and purifying chemical components.

The Antoine equation can also be used to calculate other thermodynamic properties of a substance, such as enthalpy of vaporization or boiling point. However, it is important to note that the accuracy of the Antoine equation relies on the specific values of A, B, and C for each substance, which may vary depending on experimental conditions and the range of temperatures being considered.