VOLUME CHANGES IN THE PROCESS OF SOLUTION. 95 



The specific volume of liquid formamide at 30° O. was 

 found to be # 88776, so that whereas tiie process of solution 

 in either water or alcohol is accompanied by contraction, 

 when dissolved in the mixture there is an increase in the 

 volume of the system. 



Table XXIV. 



Solute — Acetamide. Temp. 30° C. 



(a) In water. 



A 





* 



^s 



4-5875 





•998254 



•945 



7-5278 





•999892 



•944 



10-1471 





1-001300 



•943 



16-7179 





1-004590 



•942 





W 



In ethyl alcohol. 





4-3441 





•789723 



•932 



7-0327 





•794941 



•933 



9-6461 





•799847 



•934 



(c) In water-alcohol (25*44 per cent, alcohol). 

 5-3795 -959944 -949 



13-2547 -965848 -950 



(d) In water-alcohol (36-62 per cent, alcohol). 

 5-2768 -939815 -954 



10-9203 -944726 -954 



(e) In water-alcohol (47*11 percent, alcohol). 

 4*5536 -917524 -953 

 9-5581 -922779 -954 



16-2709 -929080 -955 



(/) In water-alcohol (58-89 per cent, alcohol). 



4-8831 -892021 -950 



12-1520 -900599 -954 



The specific volume of liquid acetamide, extrapolated for 

 a temperature of 30° is '956 (Meldrum and Turner), 1 and 

 the values of v s in solutions containing 36*62 and 47*11 

 per cent, alcohol are almost identical with this. 



' J.C.vS., 1908, 93, 876. 



