Densities, speeds of sound and refractive indices have been measured for (n-hexane + cyclohexane + 1-hexanol) and its corresponding binaries at T = 298.15 K. In addition, ideal isentropic compressibilities were calculated from the speeds of sound, densities, and literature heat capacities and cubic
Surface tension and refractive index of (lithiumbromide  +  water  +  1,3-propanediol)
β Scribed by J.-W Lee; J.-S Kim; H Lee; Y.-W Lee; Y.-S Baek; H.-S Pang
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 156 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0021-9614
No coin nor oath required. For personal study only.
β¦ Synopsis
Surface tensions and refractive indices were measured for (lithium bromide + water + 1,3propanediol), which can be proposed as a new potential working fluid in air-cooled absorption chillers. The mass ratio of lithium bromide to 1,3-propanediol is fixed at 3.5 : 1, an optimal value for avoiding crystallization problems. The experimental temperature ranged from 298.2 K to 323.2 K, and the lithium bromide mass fraction up to 0.659. Both the data of surface tension and refractive index were successfully correlated with simple polynomial equations with average absolute deviations (a.a.d.) of 0.189 and 0.032 per cent, respectively.
π SIMILAR VOLUMES
The osmotic coefficients of aqueous calcium chloride solutions were experimentally determined at T = 313.15 K by the isopiestic method. Magnesium chloride served as the isopiestic standard for the calculation of osmotic coefficients. The molality range covered in this study correspond to about 0.1 m
In the framework of a series of studies carried out by our research team, the excess molar enthalpies H E m and excess molar volumes V E m for 21 binary mixtures composed of one of three butyl esters (ethanoate, propanoate, and butanoate) and one of seven odd n-alkanes (pentane to heptadecane) were
The activity coefficient data were reported for (water + potassium chloride + DL-valine) at T = 298.15 K and (water + sodium chloride + L-valine) at T = 308.15 K. The measurements were performed in an electrochemical cell using ion-selective electrodes. The maximum concentrations of the electrolytes
Measurements of the enthalpy of solution for carbon dioxide in (water + monoethanolamine, or diethanolamine, or N -methyldiethanolamine) and in (water + monoethanolamine + N -methyldiethanolamine) at T = 298.15 K have been made by isothermal displacement calorimetry. The estimated uncertainty is bet
We show that the simple matroid PG n -1 q \PG k -1 q , for n β₯ 4 and 1 β€ k β€ n -2, is characterized by a variety of numerical and polynomial invariants. In particular, any matroid that has the same Tutte polynomial as PG n -