The heat absorbed during the mixing of binary solutions of pairs of univalent electrolytes with common ions has been measured. The heat effects are somewhat smaller than those observed when electrolytes without common ions are mixed but are by no means negligible. When both of two cations are small, or when both are large, heat is generally absorbed ; when one is large and the other small heat is usually evolved.The molal heats of mixing when one molal solutions are mixed are approximately quadratic functions of the solute mole fraction, x3. The relative partial molal enthalpies are therefore approximately linear functions of x3.

Spontaneous ignition phenomena have been evaluated for eight experimental hydraulic fluids. The technique of thermo-electric flame detection has been us-J to determine the minimum spontaneous ignition temperature for each system ii air at one atmosphere pressure. Differential thermal analysis has been employed for the study of the thermal and oxidative degradation of two experimental lubricants in the presence of several metal oxide catalysts. Six other lubricant systems without added catalytic agents have been subjected to This document is subject to special export controls and each transmittal to foreign governments or foreign nationals may be made only with prior approval of the Fluid and Lubricant Materials Branch,

No abstract

No abstract

No abstract