Lithium + methylamine solutions. Part 3.—Vapour pressures

The vapour pressures of the lithium + methylamine system have been determined as a function of metal concentration between –55 and + 5°C. The activity of methylamine deviates positively from Raoult's law at low metal concentrations and then negatively with increasing metal concentrations, in a similar way to that in metal + ammonia solutions. The results obtained are discussed using a simple model, in which solutions are considered as consisting of metal atoms solvated by several methylamine molecules and free methylamine molecules.