Entropy vaporization

In this equation, the molar vaporization entropy appears, which is approximately constant for many substances according to Fig. 2.1-3. The following then results if the same derivation is done for the solution ... 

The molar vaporization entropies of both equations are equated. Then Dilhring s... 

For nonprotic fluids, as Table 13.1.6 further shows, the vaporization entropy is strongly dominated by the entropy of HS depaeking. This is an at least qualitative representation of the longstanding claim that repulsions play the major role in the structure of dense fluids. This circumstance is ultimately responsible for the striking sueeess of the deserip-tion of neutral reactions in the framework of a purely HS liquid, as diseussed in Seetion 13.1.6. 

The authors discuss experimental methods used to measure and derive enthalpies of polymerization. A listing of experimental data on enthalpies of polymerization is provided for 81 organic polymerization reactions. Other tables give enthalpies.of formation, enthalpies of vaporization, entropies, Gibbs... 

The entropy of the saturated liquid is taken from the experimental results published by Daunt [4] et al. and by Abraham, Osborne and Weinstock [5]. Saturated vapor entropies are computed from the relation... 

Table L Saturated Liquid and Vapor Entropy and Enthalpy...

This ratio of the standard vaporization enthalpy Ay pH° to the normal boiling temperature (at 1 bar), that is, the standard vaporization entropy AvapS , is called Trouton s constant Frederick Trouton, see box). Table 3.1.4 indicates that the values of AvapS are in the range 70-110 Jmol K , and we can use 90 J mol as a... 

AvapH°/T° i ) equals the standard vaporization entropy AyapS . For an estimation of AyapH° based on we may use AyapS° 90J mol" (Trouton s rule of thumb). 

Enthalpies of sublimation at the melting point Vaporization entropies at the boiling point. 

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