Contributions to the Data on Theoretical Metallurgy: [Part] 11. Entropies of Inorganic Substances: Revision (1948) of Data and Methods of Calculation Page: 26
The following text was automatically extracted from the image on this page using optical character recognition software:
26 CONTRIBUTIONS TO DATA ON THEORETICAL METALLURGY
Carbonate.-The heat capacity of BaCO3 (witherite) was measured
by Anderson (15) (540-2960). Calculation gives S98.16=26.80.5, of
which 3.59 is extrapolation below 56.20.
Chloride.-Brown, Smith, and Latimer (61) (140-3020) studied the
heat capacity of BaC12.2H20 (c). The extrapolated portion of the
entropy is 0.33 below 14.130 and the measured portion is S298.6-
S14.13=48.18. Therefore, S298.16s=48.50.2.
Fluoride.-The heat capacity of BaF2 (c) was measured by Pitzer,
Smith, and Latimer (391) (130-3010). Their data yield S2098.16
23.03 0.10, of which only 0.06 is extrapolation below 13.34.
Hydride.-Available molecular-constant data for BaH(g) (212, 311)
yield S29.1= 52.3 0.1.
Nitrate.-The heat capacity of Ba(NO3)2(c) was measured by Lati-
mer and Ahlberg (316) (160-2960) and Shomate and Kelley (435)
(540-2970). The two sets of data are in excellent agreement and yield
S298.16- 51.10.2, of which 0.56 is extrapolation below 15.80
Sulfate.-Latimer, Hicks, and Schutz (324) (150-2990) measured the
heat capacity of BaSO4(c). There are computed S44.13=0.16 (extra-
polation) and S298.6-S4.13=31.43 (measured). The total is S298s.6-=
Element.-The heat capacity of Be(c) was measured by Cristescu
and Simon (117) (100-3000), Lewis (329) (970-2830), and Simon and
Ruhemann (441) (710-800). The entropy calculation is based upon the
work of Cristescu and Simon, which is the most extensive. Their data
yield S98.1--= 2.280.02. The extrapolation below 100 is virtually
negligible, about 0.0002 unit.
The entropy of Be(g) is given as S298.18= 32.550.01 by the Sackur
Oxide.-Giinther (204) (760-850) and Kelley (277) (550-2930) have
measured the heat capacity of BeO(c). Employing the data of the
latter investigator, there is obtained S298s.1= 3.370.02. The extra-
polation below 53.10 is 0.037 unit.
The moment of inertia and vibration frequency of BeO(g) were
determined by Herzberg (214) as 1=-16.72X 10-40 and co- 1,475. From
the first figure S+,,298.16-47.16, and from the second, S,,298.18=0.01,
Chloride.-Molecular-constant data (212, 311) yield S9s.8.1= 51.81
0.10 for BeCl(g).
Fluoride.-The value, S298.16=49.130.10, for BeF(g) is computed
from available molecular-constant data (212, 311).
Hydride.-For BeH(g), available molecular-constant data (212, 311)
yield S~9s.16=42.20 0.10.
Silicate.-Kelley (277) (540-2950) measured the heat capacity of
Be2SiO4 (phenacite). His data yield S98.18= 15.37 0.08, of which
0.30 is extrapolation below 53.10.
Element.-The low-temperature heat capacity of Bi(c) was investi-
gated by Anderson (11) (600-2990), Bronson and MacHattie (57)
(1930-2930), and Keesom and van den Ende (249, 250) (30-200).
Combining these data, there is calculated Slg9s.18= 13.6 =t 0.6. The extra-
Here’s what’s next.
This report can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Report.
Kelley, K. K. Contributions to the Data on Theoretical Metallurgy: [Part] 11. Entropies of Inorganic Substances: Revision (1948) of Data and Methods of Calculation, report, 1950; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc12637/m1/30/: accessed April 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.