5 Questions
What is the main difference between an interface and a surface?
An interface is only between two immiscible phases, while a surface is between a liquid and air.
What happens to the spreading coefficient on water as the carbon chain of an acid increases?
It decreases
Why does benzene spread on water?
Because the cohesive forces between its molecules are weaker than the adhesion for water
What is the unit of surface tension?
N/m
Why does liquid petrolatum not spread on water?
Because it is nonpolar
This quiz covers the concepts of surface tension and interface, including the definition and units of surface tension, and how the properties of oleic acid and other substances affect their behavior at interfaces.
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