CHEMICAL THEORY OF SOLUTIONS. PART I. 



45 



. _ 10.9(l-'2ii^) 

 ■"•a — ^ 



where the uuit of pressure is one atomosphere and 311.71 is the 

 hypothetical absolute boiling point. 10.9 is the general constant 

 according to the law of Trouton and the constant 311.71 is 

 determined from the data at 0°. Now if a second point on the 

 vapour pressure curve be given, D and X can be determined. 

 Zawidzki found the vapour pressure of acetone at 35.17° to be 

 344.2, from which we get 



Cl = 3290 calories 



3: = 404.43. 



With these constants the vapour pressure of acetone at various 

 temperatures has been calculated as shown in the following table. 



1) This table has been calculated by Y. Yamasaki, a student of chemistry. 



