High Temperature Properties of Cesium.

High Temperature Properties of Sodium.

“…These properties for all three metals have been reported by Stone et al (10,11,12), and those for potassium have been reduced thermodynamically to yield a consistent body of vapor properties-enthalpy, entropy, specific heat, and specific volume (3). This article describes a similar reduction of the measured properties of sodium.…”

“…The PVT data of Stone and coworkers (10) were fitted by the graphical method described for potassium (3) The degree of fit of the virial equation to the observed PVT data is shown graphically with Figure 1 in which compressibility isotherms generated with Equation 1 are compared to experimental compressibilities at 100-degree intervals from 1775°to 2575°F. The fit of the equation can also be shown numerically.…”

“…These thermodynamic properties were computed along constant temperature lines with the starting point for a particular property being the value of that property for the monomeric gas at 1 atm. The working expressions for the properties are the same as those presented for potassium (3) and the computational steps are outlined in this section.…”

Molecular association in sodium, potassium, and cesium vapors at high temperatures

“…If PVT data are of sufficiently high precision, a distinction between trimer and tetramer can be made with eq 3. If, in a vapor mixture, species of molecular weight higher than the trimer are not present, eq 3 (by setting fa = 0) reduces to fa' -2fa2p3 = fa + 2fap (4) Likewise, if the trimeric species is taken as insignificant, the same equation reduces to fa' + 2 fafap3 = fa + Sfap2 (5) It follows from these equations that a linear relationship between (fa' -2fa2p3) and p implies the existence of trimer, while a linear relationship between (fa' + 2fafap3) and p2 implies the existence of tetramer.…”

Preliminary Collation of the Thermodynamic and Transport Properties of Cesium.

“…A preliminary evaluation of t h e a v a i l a b l e d a t a i s included. A f i n a l r e p o r t issued a t t h e conclusion of t h i s program w i l l contain (1) a s e t of recommended equations,'and (2) an indica-. .…”