Apparatus for the determination of melting points, molecular weights, freezing points and purity, and for the study of melting.
An apparatus for the determination of the melting point of a partially frozen liquid is described. Thermal equilibrium is rapidly attained, largely because of the presence of glass balls in the experimental flask, and the method of agitation. The use of a thermistor and a recording potentiometer allows charting of the temperature changes with time. The melting point can be calculated from points on the trace. The apparatus has been used to study melting point depressions for solutions of hydrocarbons and phenols in benzene, nitrobenzene, water and dioxan.
Greenwood
R F
RF
Department of Chemistry The City University St. John Street, London E.C.1. U.K.