Question: Considering the Carnot cycle as applied to a liquid film, show that in an isothermal process the amount of heat required for the formation of

Considering the Carnot cycle as applied to a liquid film, show that in an isothermal process the amount of heat required for the formation of a unit area of the surface layer is equal to q = T . da/dT where da/dT is the temperature derivative of the surface tension.

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