Thermodynamically consistent equilibrium properties of normal-liquid 3He

The high-precision data for the specific heat CV(T,V) of normal-liquid 3He obtained by Greywall, taken together with the molar volume V(T0,P) at one temperature T0, are shown to contain the complete thermodynamic information about this phase in zero magnetic field. This enables us to calculate the T and P dependence of all equilibrium properties of normal-liquid 3He in a thermodynamically consistent way for a wide range of parameters. The results for the entropy S(T,P), specific heat at constant pressure CP(T,P), molar volume V(T,P), compressibility κ(T,P), and thermal expansion coefficient α(T,P) are collected in the form of figures and tables. This provides the first complete set of thermodynamically consistent values of the equilibrium quantities of normal-liquid 3He. We find, for example, that α(T,P) has a surprisingly intricate pressure dependence at low temperatures, and that the curves α(T,P) vs T do not cross at one single temperature for all pressures, in contrast to the curves presented in the comprehensive survey of helium by Wilks