What Is the Vapor Pressure of Ethanol?

By Staff WriterLast Updated Mar 28, 2020 2:11:09 PM ET

The vapor pressure of ethanol at room temperature (20 to 25 degrees Celsius) is between 45 to 55 mmHg. The vapor pressure of ethanol changes as its temperature does.

Vapor pressure is a characteristic of all liquids and solids. Vapor pressure is the pressure of the vapor resulting from the evaporation of a liquid or solid. The vapor pressure of one substance may be very different than the vapor pressure of another. For example, the vapor pressure of ethanol is much higher than that of water. The vapor pressure of any substance will increase as the substance's temperature increases. Generally, the vapor pressure of a liquid is much higher than that of a solid.