The System Ozone-Oxygen

Abstract

At temperatures below —180°C liquid ozone and liquid oxygen are not miscible in all proportions. Two liquid phases occur over a definite range in composition which depends upon the temperature. The solubility diagram at saturation pressures has been determined experimentally by measuring vapor pressure versus composition isotherms at —183.0°C, —185.7°C, and —195.6°C. The upper or oxygen-rich liquid phase has been analyzed at —181.9°C, —182.9°C, —186.0°C, and —195.6°C. The critical solution temperature is —179.9°C±0.5°C. A liquid-vapor equilibrium diagram at one atmosphere total pressure has also been determined experimentally.