energy changes. It follows that in order to increase surface area, a certain amount of energy must be added. Gibbs free energy is defined by the equation, ref name="moore" cite book|title=Physical Chemistry, 3rd ed.|author=Moore, Walter J.|publisher=Prentice Hall|year=1962 /ref math \scriptstyle G \ = \ H \ - \ TS /math , where math \scriptstyle H /math is enthalpy and math \scriptstyle S /math is entropy . Based upon this and the fact that surface tension is Gibbs free energy per unit area ...
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