Abstract

A new flow-microcalorimetric vessel has been designed for the determination of enthalpies of solution of small quantities of easily or slightly soluble liquids. The design was a modification of a titration vessel that fitted into our four-channel microcalorimetric system. Different coil materials used for the adherence of the solutes in the sample compartment have been tested. Final concentrations of the solutes were usually low enough for the solutions to be regarded as infinitely dilute. The instrument was calibrated by dissolution of propan-1-ol in water and has been tested by dissolution of benzene in water, at four different temperatures (288.15 to 318.15 K), and by octan-1-ol, at 298.15 K in water, and by butan-1-ol in ethan-1,2-diol at 298.15 K.

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