CHAPTER 15. Volumetric Properties and Thermodynamic Response Functions of Liquids and Liquid Mixtures

Pressure–Volume–Temperature Relationships for Aqueous Solutions of N-Methylacetamide at Temperatures Ranging from 278.15 to 323.15 K and Pressures up to 100 MPa

“…The experimental density data of the NMA aqueous solution were presented as a function of temperature and pressure using a Tate-type equation (eq 3) 33 T p T C ( , ) ( )…”

“…The experimental density data of the NMA aqueous solution were presented as a function of temperature and pressure using a Tate-type equation (eq ) where B and C are adjustable parameters, p 0 is the reference pressure density (0.101 MPa), and ρ 0 is the density at a pressure p 0 and is described by the polynomial equation (eq 4) It is assumed that in formula the coefficient C is independent of temperature. The behavior of parameter B is described by eq The adjustable parameters a i , b i , and C were determined for each molar fraction of the binary mixture by correlating the experimental density values with respect to pressure and temperature.…”

Gibbs Energy and Helmholtz Energy

“…the molar heat capacity at constant pressure is defined by eqn (1.139) and with eqn (1.163) we obtain .190) in high-pressure research, [136][137][138][139][140][199][200][201][202][203][204][205][206] eqn (1.189) and (1.190) are particularly interesting. For instance, the pressure dependence of C P of a constantcomposition fluid may be determined either from PVT data alone or by high-pressure calorimetry or by transitiometry, 136,137 or by measuring the speed of ultrasound at sufficiently low frequency as a function of P and T, 138,199,201,202,[204][205][206][207][208][209][210][211] and the consistency of the experimental results can be ascertained in various ways. Starting from…”

“…to an excellent approximation, i.e. neglecting dissipative processes due to shear viscosity η s , thermal conductivity λ, bulk viscosity η v , etc., v 0 may be treated as an intensive thermodynamic equilibrium property 32,138,[207][208][209][210][211][212][213][214][215] related to β S via eqn (1.207). alternatively, by using the relations provided by eqn (1.131) and (1.132), we have…”