Abstract: Experiments were conducted in order to determine the heat effects which accompany the reactions between gaseous chlorine and strong, concentrated aqueous base solutions. The bases used were potassium hydroxide (KOH) and potassium hydroperoxide (KO$-2$/H). Solution concentrations ranged up to 7 M. Chlorine gas (Cl$-2$/) was bubbled into the base solution which was thermally isolated from the surroundings in a Dewar vessel. From the experimental data, enthalpies of reaction and enthalpies of formation for the concentrated basic solutions were calculated.!5
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