Thermal expansion coefficient saturation value

Fig. 29. GrUneisen analysis for CeAl3 showing the measured coefficients of specific heat (upper plot), thermal expansion (middle plot) and the Griineisen parameter deduced from their ratio (lower plot). As the temperature is lowered Q approaches saturation to a value 50. Below 1 K it Crosses over to a large negative value (-200) appropriate to the ground state. Data for C(T) from Phillips et al. (1987) for p from Andres et al. (1975) and from Ribault et al. (1979).

Here (dPI8T)y is the isochoric thermal pressure coefficient that is seldom measured directly and is generally obtained by the last equality in (3.22). The magnitude of is >100 MPa, so that at ambient conditions and saturation vapor pressures, the last term, -P, in Equation 3.22 can be neglected. The isobaric expansibility, a, and isothermal compressibility, Kj, are available in Table 3.3. The differences U/Vat 25°C for the solvent listed here are shown in Table 3.8, with non-stiff solvents marked by italics font. The value of U/V-P for water is by far larger than for other structured solvents, but it diminishes with increasing temperatures [30] to become commensurate with P, of other solvents above 250°C. 

NIST/ASME Steam Properties Database versiou 2.21 http //www.nist.gov/srd/nistlO.cfm (accessed November 10, 2010) (purchase required). Thermophysical properties include in the STEAM Database temperature, Helmholtz energy, thermodynamic derivatives, pressure, Gibbs energy, density, fugacity, thermal conductivity, volume, isothermal compressibility, viscosity, dielectric constant, enthalpy, volume expansivity, dielectric derivatives, internal energy, speed of sound, Debye-Hlickel slopes, entropy, Joule-Thomson coefficient, refractive index, heat capacity, surface tension. The STEAM database generates tables and plots of property values. Vapor-liquid-solid saturation calculations with either temperature or pressure specified are available. 

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