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Zirconium bromide


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
Deltafgas301.25kJ/molReviewChase, 1998Data last reviewed in June, 1970
Quantity Value Units Method Reference Comment
gas,1 bar265.56J/mol*KReviewChase, 1998Data last reviewed in June, 1970

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. - 1600.1600. - 6000.
A 38.1758248.91640
B -5.728273-2.231127
C 10.856890.358120
D -3.512091-0.016881
E -0.112338-9.764076
F 289.6546270.5634
G 312.3808308.5144
H 301.2484301.2484
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1970 Data last reviewed in June, 1970

Constants of diatomic molecules

Go To: Top, Gas phase thermochemistry data, References, Notes

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

Data compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through July, 1975

Symbols used in the table of constants
SymbolMeaning
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for (90)Zr(79)Br
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
Unclassified, mostly R shaded band heads in emission at 26600 - 26650 and 26910 - 26980 cm-1.
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System B: 1            26481.0 H
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System B:            26305.2 H
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            26133.9 H
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            25959.6 H
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StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
System C: 2            24396.0 H
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System C:            24177.2 H
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            23936.3 H
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            (23708) H
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Notes

1Four 0-0 sequences (omega'-omega" ~ -3.5) of narrow R shaded heads; in em. possibly quartet system.
2Four groups of narrow R shaded heads, three of the groups having the appearance of long 0-0 sequences (omega'-omega" ~ +6); in emission. 4Pi rarrow 4Sigma ?

References

Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, Notes

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]


Notes

Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, References