molal heat capacity

molal heat capacity

[′mō·ləl ′hēt kə‚pas·əd·ē]
(physical chemistry)
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through the range 0[degrees] to 95[degrees] C, calculations have been made of (1) the standard potential of the silver-silver-ehloride electrode, (2) the activity eoeffieient of hydrochloric aeid in aqueous solutions from m (molality) = 0 to m=0.1 and from 0[degrees] to 90[degrees] C, (3) the relative partial molal heat content of hydrochloric acid, and (4) the relative partial molal heat capacity of hydrochloric acid.
The relative partial molal heat capacity was changed about 0.4 j [deg.sup.-1] [mole.sup.-1] at 0[degrees] C, 0.5 j [deg.sup.-1] [mole.sup.-1] at 25[degrees] C, and 1.2 j [deg.sup.-1] [mole.sup.-1] at 90[degrees] C.
The temperature variation of log [[gamma].sub.[+ or -]] can be used to calculate the partial molal heat content, [L.sub.2], and partial molal heat capacity, [J.sub.2], of hydrochloric acid relative to its value in the infinitely dilute solution.
The relative partial molal heat capacity, [J.sub.2], at 25[degrees] C is plotted in figure 4.