452 



For tlien, when l^T in the eqnation of state is made smaller by a 

 factor << 1, also v — 1> will be smaller, lience h greater. In this way 

 the too small 6-valnes could therefore be raised to the normal amount. 

 We shall see in the following paragraph that inside the i-egion of 

 coexistence the same phenomenon takes place : the /0-values in the 

 vapour much too small (even large negative), the /^-vabies in the 

 liquid phase normal and in harmony with the theory. 



Something particular takes therefore place for the large volumes: 

 there is either association in the vapour, or the values of the pressure 

 have been measured too small, or the values of the vapour densities 

 too hirge. We shall presently return to this. 



ƒ. Isotherm of 

 3,424 m = 3,244. 



J30^38 = 142,71 absolute. Hence m=0,9473. 



Mean 0.371 



Here we should have y = 0,727, /9r = 0,415, /?,^ = /3,X^ '-^'^ = ^.421. 

 Hence the value of /-V, found is too low. 



g. Isotherm of -139^62 = 133,47 abs. Here is ??z = 0,8860, 



With r= 133,47 corresponds y=r 0,719, /?/. = 0,411, J3^=/3^X 

 X 1,457 = 0,416. The found value of /?^, viz. 0,285, is far below 

 the theoretical value 0,42. 



h. Isotherm of 



149°,60 = 123,49 abs. For m is found 



m = 0,8197, so 3,424 ?// = 2,807. 



