344 



Mr. Gervaise Le Bas on 



(6) At corresponding Temperatures. 



If an examination of Table XIV. be made, it will be seen 

 that, while the values of V/W are nearly equal for the four 

 compounds pentane, hexane, heptane, and octane at corre- 

 sponding pressures, the reduced temperatures are not 

 identical but increase from pentane to octane. It follows, 

 therefore, that if the volumes were taken at equal fractions 

 of the critical temperature, the values of V/W would be 

 found to diminish in the same direction. The following- 

 table shows how far this is true. In order to farther show 

 the close relationship between the law of corresponding states 

 and that of additivity, an additional table is included which 

 gives the values of V/V K at identically reduced temperatures. 



XVII.— Table of Values of V/W for the Paraffin 

 Hydrocarbons at identically reduced temperatures. 



T/T K . 

 •5805 



C,H 12 . 



C 6 H 14 . 



C 7 H 1G . 



1 

 C 8 H 18 . 



V. 



V/W. 



■ V. 



V/W. 



V. 



V/W. 

 3-40 



V. 



V/W. 



111-33 



3-48 



130-6 



3-44 



149-8 



169-25 



3-38 



•6231 



114-72 



3-58 



134-5 



3-54 



154-2 



3 50 



174-65 



3-49 



•7959 



131-90 



4-18 



157-3 



4-14 



180-5 



4-10 



204-7 



411 



•8917 



153-85 



4-81 



180-6 



4-75 ! 



207-1 



4-71 







•9963 



238-9 



7-46 



282-3 



7-43 



325-5 



7-40 







1-0000 



309-2 



9-66 



366-3 



9-64 



425-7 



9-67 



488-9 



9-77 



In spite of the diminution in the value of V/W with 

 complexity, the very similar rise in the case of the four 

 hydrocarbons is unmistakable. The limits within which the 

 law of additivity holds are still narrow. 



XVIII.— Table of Values of V/V K for the Paraffin 

 Hydrocarbons at corresponding temperatures. 



T/T c . 



5 H 12 . 



C 6 H 14 . 



C 7 H 16 . 



c As- 



V. 



111-33 

 114-72 

 131-90 

 153-85 

 £09-2 



v/v K . 



V. 



v/v K . 



V. 



v/v K . 



v. 



v/v K . 



•5805 

 •6231 

 •7959 

 ■8917 

 1-0000 



•3600 

 •3710 

 •4330 

 •4970 

 10000 



130-6 



134-5 



157-3 



180-65 



366-3 



•3546 

 •3672 

 •4295 

 •4937 

 1-0000 



149-8 

 154-25 



180-55 

 207-15 

 4257 



•3519 

 •3623 

 •4241 



•4868 

 1-0000 



169-25 

 174-65 

 20475 



488-9 



•3642 



•3572 



•4188 



i-66'oo 



