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Previous tabulations of enthalpies of formation of perchloric acid solutions are not in agreement with the behavior expected for an acid as highly dissociated as perchloric acid. Measurements of the heats of neutralization of perchloric acid solutions with sodium hydroxide solutions were made and new values of the relative apparent partial molal enthalpies of perchloric acid solutions in the range 1 to 24 molal were computed from these. These new values agree with the anticipated behavior of perchloric acid.
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Bidinosti et al. (1956) studied this question.
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