Die erlangungsfähigkeit des gleichgewichtes in systemen, die aus flüssigkeit und wenigstens aus einer festen phase gebildet sind

Abstract The difficulties associated with the precise determination of the freezing temperature of different systems containing one, two, or several solid phases are discussed. The “thermal sensitivity test” is suggested for testing whether the precision with which the thermodynamic liquid-solid phase equilibrium, is restored is quite satisfactory. The static method makes it possible to introduce or to remove very small quantities of heat and to observe whether or not the restoration of the phase equilibrium takes place. If a kinetic method is applied, the “thermal sensitivity” of the system may be tested by comparing the solidification and the melting curves determined at different crystallization or melting velocities.