Abstract
An experimental set-up for measuring enthalpies of solution of gases in liquids is described. This apparatus consists of a vacuum line for gas handling and a Tian-Calvet microcalorimeter. The gas quantities are measured by a mercury manometer. The gas is injected into the calorimeter cell through a sintered glass-mercury one-way valve. The various sources of systematic and random errors are analyzed. The experimental method allows the measurement of the reaction stoichiometry and the distinction between fast and slow reactions; on the calorimeter time-constant scale. Along with spectroscopic studies of the reaction products, these features enable a more thorough characterization of the final state than the usual calorimetric techniques used for similar studies. A summary of the applications in the fields of physical organic chemistry, polymer chemistry and natural gas refining is given.
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