106 Prof. W. C. McC. Lewis on the Relation of the 



Table I. 



Minimal values for the Internal Pressure or Cohesion 

 of Liquids at 0° C. 



[Values of v c marked (Y.) denote those given by Young, 

 those marked (Math. Wald.) are taken from a paper by 

 Walden (Zeitsch. phjsik. Chem. lxvi. p. 407, 1909).] 



Substance. 



Vc = 



Molecular 

 critical 

 volume. 



v l= 

 0-27 vc. 



v = 



Molecular 



volume 



at 0° C. 



v Q -vi. 



ET 



7T0° C. = 



in 

 atmospheres/cm. 2 



Benzene 



256-1 (Y.) 

 315-4 „ 

 306-8 „ 

 281-9 „ 

 391-3 ., 

 345-0 „ 

 229-0 „ 

 227-6 „ 

 286 „ 

 172-0 „ 

 284-5 ., 

 386-4 „ 

 3851 „ 

 307-9 „ 

 323-6 „ 

 3509 „ 

 276-2 „ 

 307-3 „ 

 207-0 (Math. 

 Wald.^ 

 166 (Wald.) 

 270-7 (Y.) 

 489-9 „ 

 1176 „ 

 166-9 „ 

 219-5 „ 

 171-1 „ 

 50-3(Wald.) 

 190-5 „ 

 310-0 (Y.) 

 427-1 „ 

 490-0 „ 

 4819 „ 

 348-4 „ 

 307 1 „ 

 351-8 „ 

 281-7 „ 



67-15 

 85-16 

 99-06 

 76-11 

 105-65 

 93-15 

 61-83 

 61-49 

 77-22 

 46-44 

 76-82 

 10433 

 10398 

 83-13 

 87-37 

 94-74 

 74-57 

 82-97 

 55 89 



44-82 



7309 



13227 



31-75 



45-06 



59-27 



46-36 



13-58 



51-44 



83-7 



12532 



132-3 



130-11 



94-07 



82-92 



94-99 



76-06 



86 7(Y.) 



104-8 „ 



127 „ 



100 5 „ 



138-7 „ 



1121 „ 



78-0 „ 



77-1 „ 



95-2 „ 



59-8 „ 



94-8 ., 



1261 „ 



1273 „ 



99-29 „ 



103-2 „ 



109-6 „ 



94-3 „ 



112-6 „ 



71-45 



58-78 



91 -7 (Y.) 

 158-3 „ 



39-5 „ 



56-1 „ 



73-3 „ 



56-1 



18-0 



69-9 



111-6(Y.) 

 142-8 ,, 

 158-7 „ 

 1605 „ 

 126-6 „ 

 105-4 „ 

 114-5 „ 

 108-7 „ 



2055 

 1964 

 27-94 

 34-39 

 33-05 

 18-^5 

 16-17 

 15-61 

 17-98 

 13-36 

 17-98 

 21-77 

 23-32 

 1616 

 15-83 

 14-86 

 19-73 

 29-63 

 15-56 



13-98 

 18-61 

 26-03 

 7-75 

 11-04 

 14-03 

 9-74 

 4-42 

 13-46 

 2790 

 17-48 

 26-40 

 30-39 

 32-53 

 2248 

 19-51 

 32-64 



1093 



1144 



804 



653 



679 



1188 



1389 



1439 



1249 



1682 



1249 



1032 



963 



* 1398 



1429 



1512 



1138 



758 



1443 



1610 



1207 



863 



2898 



2035 



1601 



2307 



5084 



1218 



805 



1285 



851 



730 



690 



999 



1135 



688 



Toluene 



w-Hexane 



Ethyl ether 



Ethyl propionate 



Propyl acetate 



Ethyl formate 



Methyl acetate 



Ethyl acetate 



Methyl formate 



Propyl formate 



Methyl butyrate 



Methyl-2-butyrate ... 

 Chlorbenzene 



Brombenzene 



Iodobenzene 



Carbon tetrachloride .. 

 i-pentane 



Acetone 



Carbon disnlphide ... 



Fluorbenzene 



w-Octane 



Methyl alcohol 



Ethyl alcohol 



Propyl alcohol 



Acetic acid 



Water 



Ethyl chloride 



M-Pentane 



ft-Heptane 



w-Octane 



Di-e'-butyl 



Dw-propyl 



Hexamethy len e 



Stannic chloride 



Methyl propionate ... 



