niobium pentabromide


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
Δfgas-106.02kcal/molReviewChase, 1998Data last reviewed in December, 1974
Quantity Value Units Method Reference Comment
gas,1 bar107.37cal/mol*KReviewChase, 1998Data last reviewed in December, 1974

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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 900. to 6000.
A 31.72251
B 0.063464
C -0.017499
D 0.001512
E -0.149889
F -115.9842
G 144.9008
H -106.0201
ReferenceChase, 1998
Comment Data last reviewed in December, 1974

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
Δfliquid-130.27kcal/molReviewChase, 1998Data last reviewed in December, 1974
Quantity Value Units Method Reference Comment
liquid,1 bar65.488cal/mol*KReviewChase, 1998Data last reviewed in December, 1974
Quantity Value Units Method Reference Comment
Δfsolid-132.90kcal/molReviewChase, 1998Data last reviewed in December, 1974
Quantity Value Units Method Reference Comment
solid61.850cal/mol*KReviewChase, 1998Data last reviewed in December, 1974

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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 527. to 900.
A 47.26960
B 38.75956
C -76.69599
D 26.59895
E 0.243236
F -145.6702
G 112.5258
H -130.2758
ReferenceChase, 1998
Comment Data last reviewed in December, 1974

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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. to 527.
A 35.35014
B -0.001209
C 0.002054
D -0.001214
E -0.000005
F -143.4398
G 104.6298
H -132.9001
ReferenceChase, 1998
Comment Data last reviewed in December, 1974

Phase change 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 by: William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Δsub27.5 ± 4.3kcal/molN/ATürler, Eichler, et al., 1996Based on data from 298. to 479. K.

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]

Türler, Eichler, et al., 1996
Türler, A.; Eichler, B.; Jost, D.T.; Piguet, D.; Gäggeler, H.W.; Gregorich, K.E.; Kadkhodayan, B.; Kreek, S.A.; Lee, D.M.; Mohar, M.; Sylwester, E.; Hoffman, D.C.; Hübener, S., On-line Gas Phase Chromatography with Chlorides of Niobium and Hahnium (Element 105), Radiochimca Acta, 1996, 73, 2, 55-66, https://doi.org/10.1524/ract.1996.73.2.55 . [all data]


Notes

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