xviii CONTENTS 



IV. Binary Systems in Which Besides Liquids Only the Solid 

 Components W and X and a SoUd Compound May 



Occur 315 



V. Note by F. G. Donnan. (Analytical Addendum to the 



Geometry) 322 



I. The Conditions of Equilibrium for Heterogeneous 

 Masses under the Influence of Gravity (and 

 Centrifugal Force) (Gibbs I, pp. 144-150), D. H. 

 Andrews 327 



J. The Fundamental Equations of Ideal Gases and 

 Gas Mixtures (Gibbs I, pp. 150-184; 372-403), 

 F. G. Keyes 337 



I. General Considerations 337 



1. Pure Ideal Gases 337 



2. Mixtures of Ideal Gases 339 



3. Ideal Gas Concept as Related to the Behavior of 



Actual Gases under Diminishing Pressure 339 



4. Constancy of Specific Heat 341 



5. Concluding Statement 341 



6. Comment on Gas Law for Real Gases 341 



7. Choice of Units of Mass and Energy 343 



8. Definition of Temperature 343 



9. Constants of Energy and Entropy 344 



10. \p Function for an Ideal Gas 345 



11. f Function for an Ideal Gas 347 



12. X Function for an Ideal Gas 348 



13. Vapor Pressures of Liquids and Solids 349 



14. Effect of Presence of a Neutral Gas on Vapor 



Pressure 353 



15. Defect in the Sum Rule for Vapor Pressures 355 



16. Gibbs' Generahzed Dalton's Law 356 



17. Entropy of an Ideal Gas Mixture 357 



18. Implications of Gibbs' GeneraHzed Dalton's Law 



Apart from Ideal Gas Behavior 358 



19. Ideal Gas Mixture in a Potential Field 363 



20. Vapor Pressure of a Liquid under Pressure from a 



Neutral Gas 363 



21. AppUcation to "Gas-Streaming" Method of Meas- 



uring Vapor Pressures 365 



22. Heat of Evaporation of a Liquid under Constant 



Pressure 367 



23. Fundamental Equations from Gibbs-Dalton Law. 369 



24. Case of Gas Mixtures Whose Components Are 



Chemically Reactive 369 



