SOLUTIONS AS A FUNCTION OF TEMPERATURE 



163 



of approximately 50 liters. At higher concentrations the maximum tem- 

 perature increases very rapidly, while at lower concentrations the maxi- 

 mum increases more slowly. In solvents of lower dielectric constant, 

 the curve of maxima proceeds to lower temperatures. In Figure 36 are 

 shown curves for cobalt chloride in acetone. 16 In this case the branch 



! 



V ;6-' 



Temperature. 



FIG. 36. Showing the Conductance as a Function of the Temperature for Solutions 

 of Cobalt Chloride in Acetone at Different Concentrations. 



of the maximum at lower concentrations lies at very low values of the 

 concentration and does not appear on the figure. At higher concentra- 

 tions the course of the maximum temperature is indicated by the broken 

 line. At all points to the right of the maximum curve the temperature 

 coefficients of the solution are negative. In Figure 37 are shown the 

 conductance temperature curves for potassium iodide in methylamine, the 

 dot'ted curves relating to dilutions greater than 28.2 liters. 17 The relation 



"Rimbach and Weitzel, loc. cif. 

 * T Fitzgerald, loc. cit. 



