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In: Chemistry

The Antoine Equation is often used to calculate the saturation pressure of a pure species at...

The Antoine Equation is often used to calculate the saturation pressure of a pure species at a given temperature. Use the thermodynamic knowledge you have gained to explain what thermodynamic properties the Antoine coefficients represent.

Solutions

Expert Solution

The Antoine equation is a vapor pressure equation and describes the relation between vapor pressure and temperature for pure components. The Antoine equation is derived from the Clausius-Clapeyron relation.

The Antoine equation is a simple 3-parameter fit to experimental vapor pressures measured over a restricted temperature range:

log P = A - [B/(T+C)]

where A, B, and C are "Antoine coefficients" that vary from substance to substance

Antoine Coefficients Relate Vapor Pressure to Temperature and are having values given in mmHg


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