The Determination of the Latent Heat of Vaporization, Vapor Pressure, Enthalpy, Specific Heat, and Density of Liquid Rubidium and Cesium Up to 1800 F

Predicted high-temperature properties of rubidium

“…Specific-heat values based on monomeric gas properties (see preceding section) may be computed directly from the enthalpy values for the liquid (Table II). These are shown in Table IV to be in good agreement with the corresponding experimental values of Achener (1). The significance of this can be readily missed.…”

“…To this end, the value of the constant (\H°)C was computed from the vapor-pressure data over the measured temperature range from 1300°to 2000°F. using, in one case, the constant specific-heat value of Tepper and, in the other, values from the equation of Achener (1). [Thermal data for the solid at 77°F.…”

Saturation pressures of cesium to temperatures and pressures approaching critical state

“…Since the results for cesium reported here overlap and extend our previous measurements, both sets of data were treated as a composite. It was found that all results could be effectively fitted for the full temperature range with the equation log p = 5.87055 -7036.2/ T -0.5329 log T (1) where p is pressure in absolute atmospheres, and T is temperature in °R. The value of 0.5329 for the coefficient of the log T term was selected from the lower temperature analysis ( 9) and obtained with values of pressure equally weighted over the temperature range.…”

Melting points and boiling points for the alkali metals

“…There are only a few determinations for the normal boiling point of Rb and they have relatively poor precision (about 1 K to 5 K). Excluding the slightly high value (≈4s) from Achener (1964) [187], we calculate an average of about T b = 960±2 K. We have corrected the values in Table 15 to the ITS-90 temperature scale -the T 68 and T 48 corrections are -0.04 K and +0.31 K, respectively.…”