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Density measurements were carried out on dilute solutions of 1,3-dimethylpropyleneurea (DMPU) in normal (H 2 O) and heavy (D 2 O) water in the aquamolality range from 0.04 to 1.0 at 278.15, 288.15, 298.15, 308.15, 313.15 and 318.15K. The excess partial molar volumes of DMPU (V¯E,∞) and volume second virial coefficients (v xx ), calculated from the densities of the H/D isotopically...
Density measurements were carried out on dilute solutions of tetramethylurea (TMU) in normal and heavy water in the aquamolality ranges 0.058–1.74 and 0.052–1.72, respectively, at 278.15K, 288.15K, 298.15K, 308.15K, and 318.15K. The excess partial molar volumes of TMU (V¯E,∞) and volume second virial coefficient (vxx), calculated from the densities of the H/D isotopically distinguishable solutions,...
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