On the compressibility of liquid metals

The adiabatic compressibilities κS of 64 liquid metallic elements at their melting points were obtained from the densities ρ and speeds of sound u reported in the literature. The isothermal compressibilities were obtained from the κS values by means of the molar volumes V, isobaric expansibilities αP, and isobaric molar heat capacities CP from the literature. The ratios γ = κT/κS = CP/CV yielded the isochoric molar heat capacities CV. The products κTσ, using surface tension data from the literature, were calculated and shown to diminish linearly with increasing cohesive energy densities.