354 PROPERTIES OF ELECTRICALLY CONDUCTING SYSTEMS 



TABLE CXXXV. 



CONDUCTANCE AND FLUIDITY OF SODIUM NITRATE AT DIFFERENT 

 TEMPERATURES. 



t [i A F K/F 



350 1.173 52.87 42.6 1.24 



400 1.384 63.59 54.0 1.18 



450 1.562 73.15 65.0 1.12 



500 1.716 81.94 77.2 1.06 



It will be observed that the specific conductance \i, as well as the equiva- 

 lent conductance A, increases very nearly as a linear function of the tem- 

 perature. Obviously, the equivalent conductance will vary nearly in 

 proportion to the specific conductance, since the density of the fused salt 

 varies only comparatively little with temperature. Between 350 and 

 500, the specific conductance increases approximately 60 per cent, which 

 corresponds roughly to an increase of % per cent per degree. The fluidity 

 varies somewhat more than the conductance over the same temperature 



interval, so that, as the temperature rises, the value of the ratio H de- 



r 



creases. It is interesting to note that the value of -^ is near unity, which 



r 



differs not greatly from the value of -^ for electrolytic solutions, par- 



r 



ticularly in the case of water. This may be taken to indicate that the 

 fused salts are highly ionized. 



For different fused salts, the conductance is of the same order of 

 magnitude, corresponding to the fact that they have approximately the 

 same fluidity. In Table CXXXVI are given values of the specific con- 

 ductance \i, the equivalent conductance A, and the fluidity F, together 



with the ratio -^ for different salts. It will be observed that the ratio 



r 



TABLE CXXXVI. 

 VALUES OF A AND F FOR DIFFERENT FUSED SALTS. 



\i A F A/F 



350C. NaN0 3 .: 1.173 52.88 42.6 1.24 



KN0 3 0.6728 36.54 38.0 0.96 



" AgN0 3 1.245 55.43 45.5 1.22 



310C. LiN0 3 1.126 44.21 27.2 1.62 



250C. AgC10 3 1.4743 27.72 



-=i is of the same order for the different salts. In the case of the nitrates 

 r 



the ratio is smallest for potassium nitrate and greatest for lithium nitrate. 



The order of the ratio = corresponds to the order of the atomic volumes, 

 r 



