1885.] on the Heat of Dissolution, of Salts. 405 



Sodium Sulphate, Na 2 S0 4 , in 100 molecules of Water, or 142 parts in 



1800 parts. 



Weight of Salt used . . 

 Weight of Water used 



Specific heat of Solution Na 2 SO 4 100H 2 O='927. 



6*311 grams. 

 80-000 „ 





Water 



Temperature. 









Number 









Total 

 rise. 



Molecular 



of 

 expt. 



equiv. 

 calorim., 

 &c. 



Before 



After 



Correction. 



heat of 

 dissolution. 



solution. 



solution. 









Series A. 



1 



110 



7 



33-46 



34 



•00 



+ -006 



•546 



1360 



2 



110 



1 



33 -30 



33 



•86 



+ -oio 



•570 



1419 



3 



110 



6 



33 -24 



33 



•79 



+ -005 



•555 



1381 



4 



110 



7 



34-97 



35 



•55 







•580 



1444 



5 



110 



•6 



34 -90 



35 



•49 







•590 



1468 



6 



110 



6 



35-01 



35 



•58 







•570 



1418 



7 



110 



•7 



35 41 



35 



•93 



+ -oio 



•530 



1320 



8 



110 



7 



39 70 



40 



•30 







•600 



1494 



9 



110 



•7 



39-60 



40 



•20 







•600 



1494 



10 



110 



•7 



44-07 



44 



•68 



- -oio 



•600 



1494 



iRIES B. 



Series C. 



11 



110 '1 



31 



•19 



31 



•70 









•510 



1270 



12 



110-6 



31 



•50 



32 



•01 









•510 



1269 



13 



110 -7 



44 



28 



44 



•98 





•016 



•684 



1703 



14 



110-7 



44 



•755 



45 



•490 - 









•735 



1830 



15 



110 -7 



44 



•57 



45 



•20 





•01 



•620 



1544 



16 



110 -7 



45 



•01 



45 



•71 



+ 



•009 



•709 



1766 



17 



110-6 



63 



51 



64 



•30 



+ 



•022 



•812 



2020 



18 



110-7 



67 



80 



68 



69 









•890 



2216 



19 



110-7 



31 



•60 



32 



•06 







•460 



1146 



20 



110 6 



31 



•54 



32 



•00 







•460 



1146 



21 



110 -7 



45 



•00 



45 



•55 







•550 



1369 



22 



110 8 



44 



98 



45 



•50 



+ -006 



•526 



1311 



23 



110-7 



60 



10 



60 



•84 



+ -01 



•750 



1869 



24 



110 -7 



64 



20 



64 



94 



+ -01 



•750 



1869 



25 



110-6 



64 



•20 



64 



•96 



+ -052 



•812 



2020 



2 g 2 



