91Ó°ÊÓ

The relationship between surface tension and temperature is that as temperature increases, surface tension of a liquid generally decreases due to increased molecular vibrations and kinetic energy. The relationship between viscosity and temperature is that for most liquids, viscosity decreases with increasing temperature, as molecules slide past each other more easily. However, in gases, viscosity generally increases with temperature due to more frequent molecular collisions. Substances with high surface tension usually have high viscosities because both properties are related to the cohesive forces between molecules within the substance, originating from intermolecular interactions like van der Waals forces, hydrogen bonding, or dipole-dipole interactions.