boron


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
Δfgas565. ± 5.kJ/molReviewCox, Wagman, et al., 1984CODATA Review value
Δfgas560.00kJ/molReviewChase, 1998Data last reviewed in June, 1983
Quantity Value Units Method Reference Comment
gas,1 bar153.436 ± 0.015J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
gas,1 bar153.44J/mol*KReviewChase, 1998Data last reviewed in June, 1983

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) 4137.895 to 6000.
A 20.65193
B 0.226427
C -0.112330
D 0.016889
E 0.008714
F 553.8654
G 178.4179
H 559.9991
ReferenceChase, 1998
Comment Data last reviewed in June, 1983

Condensed 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
Δfliquid48.93kJ/molReviewChase, 1998Data last reviewed in June, 1983
Quantity Value Units Method Reference Comment
liquid,1 bar26.54J/mol*KReviewChase, 1998Data last reviewed in June, 1983
Quantity Value Units Method Reference Comment
solid,1 bar5.90 ± 0.08J/mol*KReviewCox, Wagman, et al., 1984 rhombic phase; CODATA Review value

Liquid 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) 2350. to 4137.895
A 31.75003
B 2.556177×10-7
C -6.456792×10-8
D 5.616644×10-9
E 2.705970×10-7
F 27.94205
G 46.94741
H 48.92686
ReferenceChase, 1998
Comment Data last reviewed in June, 1983

Solid 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. to 1800.1800. to 2350.
A 10.1857425.12664
B 29.244151.975493
C -18.021370.338395
D 4.212326-0.040032
E -0.550999-2.635578
F -6.036299-14.43597
G 7.08907725.59930
H 0.0000000.000000
ReferenceChase, 1998Chase, 1998
Comment β-rhombohedral phase; Data last reviewed in June, 1983 β-rhombohedral phase; Data last reviewed in June, 1983

Reaction 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.

Data compiled as indicated in comments:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
B - John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

(B+ • 10boron) + boron = (B+ • 11boron)

By formula: (B+ • 10B) + B = (B+ • 11B)

Quantity Value Units Method Reference Comment
Δr531. ± 50.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 11boron) + boron = (B+ • 12boron)

By formula: (B+ • 11B) + B = (B+ • 12B)

Quantity Value Units Method Reference Comment
Δr770. ± 150.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 9boron) + boron = (B+ • 10boron)

By formula: (B+ • 9B) + B = (B+ • 10B)

Quantity Value Units Method Reference Comment
Δr540. ± 75.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 2boron) + boron = (B+ • 3boron)

By formula: (B+ • 2B) + B = (B+ • 3B)

Quantity Value Units Method Reference Comment
Δr770. ± 150.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 3boron) + boron = (B+ • 4boron)

By formula: (B+ • 3B) + B = (B+ • 4B)

Quantity Value Units Method Reference Comment
Δr686. ± 59.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 5boron) + boron = (B+ • 6boron)

By formula: (B+ • 5B) + B = (B+ • 6B)

Quantity Value Units Method Reference Comment
Δr531. ± 67.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 8boron) + boron = (B+ • 9boron)

By formula: (B+ • 8B) + B = (B+ • 9B)

Quantity Value Units Method Reference Comment
Δr523. ± 50.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 4boron) + boron = (B+ • 5boron)

By formula: (B+ • 4B) + B = (B+ • 5B)

Quantity Value Units Method Reference Comment
Δr260. ± 59.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 6boron) + boron = (B+ • 7boron)

By formula: (B+ • 6B) + B = (B+ • 7B)

Quantity Value Units Method Reference Comment
Δr410. ± 50.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 7boron) + boron = (B+ • 8boron)

By formula: (B+ • 7B) + B = (B+ • 8B)

Quantity Value Units Method Reference Comment
Δr380. ± 50.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • boron) + boron = (B+ • 2boron)

By formula: (B+ • B) + B = (B+ • 2B)

Quantity Value Units Method Reference Comment
Δr410. ± 67.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(CAS Reg. No. 12513-02-9 • 4294967295boron) + boron = CAS Reg. No. 12513-02-9

By formula: (CAS Reg. No. 12513-02-9 • 4294967295B) + B = CAS Reg. No. 12513-02-9

Quantity Value Units Method Reference Comment
Δr905. ± 12.kJ/molN/AWenthold, Kim, et al., 1997gas phase; B

B+ + boron = (B+ • boron)

By formula: B+ + B = (B+ • B)

Quantity Value Units Method Reference Comment
Δr75. ± 59.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Notes

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

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

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

Hanley, Whitten, et al., 1988
Hanley, L.; Whitten, J.L.; Anderson, S.L., Collision - Induced Dissociation and ab initio Studies of Boron Cluster Ions. Determination of Structures and Stabilities, J. Phys. Chem., 1988, 92, 20, 5803, https://doi.org/10.1021/j100331a052 . [all data]

Wenthold, Kim, et al., 1997
Wenthold, P.G.; Kim, J.B.; Jonas, K.-L.; Lineberger, W.C., An Experimental and Computational Study of the Electron Affinity of Boron Oxide, J. Phys. Chem. A, 1997, 101, 24, 4472, https://doi.org/10.1021/jp970645u . [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, References