TAILIEUCHUNG - Thermodynamics Interaction Studies Solids, Liquids and Gases 2011 Part 15

Tham khảo tài liệu 'thermodynamics interaction studies solids, liquids and gases 2011 part 15', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 690 Thermodynamics - Interaction Studies - Solids Liquids and Gases Pa aa RT In ca c 54 where a includes among other the gas standard state and concentration-based Henry s constant. Changing to specific quantities and densities we obtain ga tâ Ma RT Mo In pa Mac 55 which looks like a function of pa and T only . the simple mixture function ga ga Pa T . However the referential state is a function of pressure so this is not such function rigorously. Except ideal gases there is probably no proof of applicability of classical expressions for dependence of chemical potential on composition out of equilibrium and no proof of its logarithmic point. There are probably also no experimental data that could help in resolving this problem. 4. Solution offered by rational thermodynamics Rational thermodynamics offers certain solution to problems presented so far. It should be stressed that this is by no means totally general theory resolving all possible cases. But it clearly states assumptions and models i. e. scope of its potential application. The first assumption besides standard balances and entropic inequality see . Samohýl 1982 1987 or model is the mixture of linear fluids in which the functional form of reaction rates was proved Ja J a c1 c2 . cn T Samohýl Malijevský 1976 Samohýl 1982 1987 . Only independent reaction rates are sufficient that can be easily obtained from component rates cf. 26 from which further follows that they are function of the same variables. This function Ji Jị c1 c2 . cn T is approximated by a polynomial of suitable degree Samohýl Malijevský 1976 Samohýl 1982 1987 . Equilibrium constant is defined for each independent reaction as follows n -RTlnKp x aPpa p 1 2 . n - h 56 a 1 Activity 37 is supposed to be equal to molar concentrations divided by unit standard concentration which is possible for ideal gases at least Samohýl 1982 1987 . Combining n this definition of activity with the proved fact that in equilibrium a eq Ppa 0 a 1 Samohýl 1982

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