SOME THERMODYNAMIC PROPERTIES OF SODIUM-POTASSIUM ALLOYS
Thesis/Dissertation
·
OSTI ID:4014408
The vapor pressures of Na and K and the activities of these elements in 4 Na --K alloys (containing 78.72%, various temperatures by the optical absorption technique. The vapor pressures for the pure metals were found to be in adequately represented by the following equations: log P/sub Na/ = -- 5872/T + 8.445 (between 275 and 350 deg C); and log P/sub K/ = --4968/T + 8.192 (between 225 and 350 deg C), where P is in mm and T is in degrees Kelvin. The heats of vaporization from these expressions are 26.87 plus or minus 0.22 kcal/ mole and 22.73 plus or minus 0.07 kcal/mole, respectively. The activity data show that the system deviates positively from Raoult's Law. The values of the activity obtained for Na were found to be considerable higher than those expected form the self-consistency rule, i.e., the Gibbs-Duhem equation. This discrepancy is attributed to the none-applicability of Beer s law to the vapoors of this element over the alloys. (Dissertation Abstr., 24: No. 8, Feb. 1964)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-18-020569
- OSTI ID:
- 4014408
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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