3. Using the dependence of the surface tension of the liquid on temperature (Table 2.1), determine the internal energy and entropy of the surface layer, the heat of formation of a unit surface and the critical temperature. What conclusions follow from the linear nature of the dependence b=f(T) and the negative sign of the temperature coefficient of surface tension?
Substance Surface tension b*103(N*m-1) at temperature C
0 10 20 30 40 50 60
Acetone 26.21 25.00 23.70 22.01 21.16 19.90 13.61

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