what is the difference between aqueous tension & surface tension ?
Aqueous tension is defined as pressure exerted by the water vapor above the surface specially of water whose temperature lie in the range of liquid state. During the process the water molecule in liquid state are in equilibrium with the molecules of water in vapor state each. Thus its is also called as water vapor pressure. The value of aqueous tension increases with the increase in temperature.
whereas Surface tension is a defined as the property of liquid that arises from the intermolecular forces experienced between the molecules at surface and molecules at bulk a liquid. In the bulk portion of a liquid a molecule experiences intermolecular forces from all directions around and allow the liquid to have a property of surface tension. Thus aqueous tension talks about two different phase whereas surface tension talks about one phase arises to have such property due to chemical interaction.