The vapor density, liquid density and differential capillary rise of pure liquid sulfur dioxide, and sulfur dioxide solutions of potassium thiocyanate were measured at 10, 15, 20, and 25°C in a sealed apparatus which allowed the measurement of all these quantities on the same solution. The apparatus consisted of two Pyrex capillaries sealed on to a Pyrex tube of 16.3 mm diameter in which a quartz bob was suspended from a calibrated quartz spring. By weighing the bob in the vapor, inverting, and weighing in the liquid, the densities could be determined to ± 0.02 mg/ml. All distances including the capillary heights were measured by a special microscope which could be read to ±0.00006 cm. Differential capillary rises could be duplicated to better than ± 0.0002 cm. From the surface tension and its rate of change with temperature the Fötvös constant, critical temperature, total surface energy and Paracor for sulfur dioxide were calculated. For the concentrations of potassium thiocyanate studied, a rise in the surface tension and liquid density was found at each temperature.
Proceedings of the Iowa Academy of Science
©1940 Iowa Academy of Science, Inc.
Eversole, W. G. and Wagner, G. H.
"Vapor Density, Liquid Density and Surface Tension of Solutions of Potassium Thiocyanate in Liquid Sulfur Dioxide for 10° to 25° C,"
Proceedings of the Iowa Academy of Science, 47(1), 190-191.
Available at: https://scholarworks.uni.edu/pias/vol47/iss1/36