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boron carbide


Gas phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Quantity Value Units Method Reference Comment
Deltafgas828.43kJ/molReviewChase, 1998Data last reviewed in June, 1963
Quantity Value Units Method Reference Comment
gas,1 bar208.56J/mol*KReviewChase, 1998Data last reviewed in June, 1963

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. - 1100.1100. - 6000.
A 19.1980736.89732
B 35.920640.624023
C -27.53189-0.058068
D 7.8056290.004012
E 0.180789-1.929339
F 821.9468812.5788
G 223.2507246.3577
H 828.4320828.4320
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1963 Data last reviewed in June, 1963

Gas phase ion energetics data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

Electron affinity determinations

EA (eV) Reference Comment
>2.40 ± 0.30Reid, 1993EA probably 64.6 kcal/mol.; B

Ionization energy determinations

IE (eV) Method Reference Comment
10.0 ± 0.6EIVerhaegen, Stafford, et al., 1962RDSH
10.5EIVilesov and Terenin, 1957RDSH

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Reid, 1993
Reid, C.J., Electron Affinities of BH, B2, BC, and BN molecules determined using Charge Inversion Spectrometry, Int. J. Mass Spectrom. Ion Proc., 1993, 127, 147, https://doi.org/10.1016/0168-1176(93)87087-9 . [all data]

Verhaegen, Stafford, et al., 1962
Verhaegen, G.; Stafford, F.E.; Ackerman, M.; Drowart, J., Mass spectrometric investigation of gaseous species in the system boron-carbon, Nature, 1962, 193, 1280. [all data]

Vilesov and Terenin, 1957
Vilesov, F.I.; Terenin, A.N., The photoionization of the vapors of certain organic compounds, Dokl. Akad. Nauk SSSR, 1957, 115, 744, In original 539. [all data]


Notes

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