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Abstract
Hydrogen-bond structural temperatures were estimated for water in solutions of NaCl, Na2SO4, MgCl2 and MgSO4 for a wide concentration range and down to –21 °C. These temperatures are proportional to the molality, the constant of proportionality being a function of the intrinsic volumes and the charges of the ions. The differences in the volumes and entropies of ice and water in the solutions have been calculated and a constant-volume entropy identified. This entropy is a linear function of the solute concentration and has a value around 0.15 J g–1 K–1 at zero concentration. Possible origins of this entropy for pure water are considered.
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Schedule a callMore From: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
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