Properties of Hydrogen Bonds in Water and Monohydric Alcohols

Resumo

The average number of hydrogen bonds formed by water, methanol, and ethanol molecules is studied, depending on temperature. An analysis of the specific volume and heat of vaporization, depending on temperature in the range from the triple point to the critical point, is used. It is shown with good accuracy that the changes in these thermodynamic quantities are of an argon-like nature, while small deviations are associated with the formation of hydrogen bonds. The average number of hydrogen bonds formed by water, methanol, and ethanol molecules is thus determined along with the effective diameter of these molecules, and they are compared to the literature data.