Zirconium bromide
- Formula: BrZr
- Molecular weight: 171.128
- CAS Registry Number: 31483-18-8
- Information on this page:
- Options:
Gas phase thermochemistry data
Go To: Top, Constants of diatomic molecules, References, Notes
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 |
|---|---|---|---|---|---|
| ΔfH°gas | 72.000 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1970 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 63.470 | cal/mol*K | Review | Chase, 1998 | Data 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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | 298. to 1600. | 1600. to 6000. |
|---|---|---|
| A | 9.124240 | 11.69130 |
| B | -1.369091 | -0.533252 |
| C | 2.594859 | 0.085593 |
| D | -0.839410 | -0.004035 |
| E | -0.026849 | -2.333670 |
| F | 69.22911 | 64.66621 |
| G | 74.66080 | 73.73671 |
| H | 72.00010 | 72.00010 |
| Reference | Chase, 1998 | Chase, 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
| Symbol | Meaning |
|---|---|
| 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) |
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Unclassified, mostly R shaded band heads in emission at 26600 - 26650 and 26910 - 26980 cm-1. | ||||||||||||
| ↳missing citation | ||||||||||||
| System B: 1 | 26481.0 H | |||||||||||
| ↳missing citation | ||||||||||||
| System B: | 26305.2 H | |||||||||||
| ↳missing citation | ||||||||||||
| 26133.9 H | ||||||||||||
| ↳missing citation | ||||||||||||
| 25959.6 H | ||||||||||||
| ↳missing citation | ||||||||||||
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
| System C: 2 | 24396.0 H | |||||||||||
| ↳missing citation | ||||||||||||
| System C: | 24177.2 H | |||||||||||
| ↳missing citation | ||||||||||||
| 23936.3 H | ||||||||||||
| ↳missing citation | ||||||||||||
| (23708) H | ||||||||||||
| ↳missing citation | ||||||||||||
Notes
| 1 | Four 0-0 sequences (ω'-ω" ~ -3.5) of narrow R shaded heads; in em. possibly quartet system. |
| 2 | Four groups of narrow R shaded heads, three of the groups having the appearance of long 0-0 sequences (ω'-ω" ~ +6); in emission. 4Π → 4Σ ? |
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
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.