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potassium hydride


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
Deltafgas123.01kJ/molReviewChase, 1998Data last reviewed in March, 1963
Quantity Value Units Method Reference Comment
gas,1 bar198.02J/mol*KReviewChase, 1998Data last reviewed in March, 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 23.2014937.25316
B 34.073321.023173
C -29.73176-0.018147
D 9.5333280.001255
E 0.005323-1.174659
F 114.8391108.6116
G 217.2082237.9888
H 123.0100123.0100
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in March, 1963 Data last reviewed in March, 1963

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
Deltafsolid-57.82kJ/molReviewChase, 1998Data last reviewed in March, 1963
Quantity Value Units Method Reference Comment
solid50.18J/mol*KReviewChase, 1998Data last reviewed in March, 1963

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. - 1500.
A 28.28279
B 60.56758
C -36.41034
D 7.935751
E -0.480344
F -70.26024
G 65.19509
H -57.81995
ReferenceChase, 1998
Comment Data last reviewed in March, 1963

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 by: 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

K- + Hydrogen cation = potassium hydride

By formula: K- + H+ = HK

Quantity Value Units Method Reference Comment
Deltar1439.840 ± 0.042kJ/molD-EAAndersson, Sandstrom, et al., 2000gas phase; Given: 0.501459(12) eV
Quantity Value Units Method Reference Comment
Deltar1420.4 ± 1.3kJ/molH-TSAndersson, Sandstrom, et al., 2000gas phase; Given: 0.501459(12) eV

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:
B - John E. Bartmess
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard

Ionization energy determinations

IE (eV) Method Reference Comment
8.0 ± 1.0SFarber, Srivastava, et al., 1982LBLHLM

De-protonation reactions

K- + Hydrogen cation = potassium hydride

By formula: K- + H+ = HK

Quantity Value Units Method Reference Comment
Deltar1439.840 ± 0.042kJ/molD-EAAndersson, Sandstrom, et al., 2000gas phase; Given: 0.501459(12) eV; B
Quantity Value Units Method Reference Comment
Deltar1420.4 ± 1.3kJ/molH-TSAndersson, Sandstrom, et al., 2000gas phase; Given: 0.501459(12) eV; B

Constants of diatomic molecules

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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: Klaus P. Huber and Gerhard H. Herzberg

Data collected through January, 1977

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 39KH
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
Theoretical potential energy curves, coupling between molecular states Numrich and Truhlar, 1975.
Fluctuating continuum in emission, 25000 - 33000 cm-1.
Hori, 1933
A 1Sigma+ 19052.8 228.2 Z -5.75 1  1.269 -0.0375 2  9.5E-5  3.68 A 3 lrarrow X R 188680.1 Z
Almy and Hause, 1932; Hori, 1933, 2; Almy and Beiler, 1942; Bartky, 1966
X 2Sigma+ 0 983.6 Z 14.32  3.4123 0.0817  15.3E-5  2.2425  

Notes

1The DeltaG(v+1/2) curve has a maximum at v ~11.
2The Bv curve has a maximum at v ~7.
3Radiative lifetime tau < 10 ns Cruse and Zare, 1974.
4The DeltaG(v+1/2) curve has a maximum at v ~16.
5The Bv curve has a maximum at v ~11.

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics 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]

Andersson, Sandstrom, et al., 2000
Andersson, K.T.; Sandstrom, J.; Kiyan, I.Y.; Hanstorp, D.; Pegg, D.J., Measurement of the electron affinity of potassium - art. no. 022503, Phys. Rev. A, 2000, 62, 2, 22503, https://doi.org/10.1103/PhysRevA.62.022503 . [all data]

Farber, Srivastava, et al., 1982
Farber, M.; Srivastava, R.D.; Moyer, J.W., Mass spectrometric determination of the thermodynamics of potassium hydroxide and minor potassium-containing species required in magnetohydrodynamic power systems, J. Chem. Thermodyn., 1982, 14, 1103. [all data]

Numrich and Truhlar, 1975
Numrich, R.W.; Truhlar, D.G., Mixing of ionic and covalent configurations for NaH, KH, and MgH+. Potential energy curves and couplings between molecular states, J. Phys. Chem., 1975, 79, 2745. [all data]

Hori, 1933
Hori, (Reference not verified), Mem. Ryojun Coll. Eng., 1933, 6, 115. [all data]

Almy and Hause, 1932
Almy, G.M.; Hause, C.D., The spectrum of potassium hydride, Phys. Rev., 1932, 42, 242. [all data]

Hori, 1933, 2
Hori, (Reference not verified), Mem. Ryojun Coll. Eng., 1933, 6, 1. [all data]

Almy and Beiler, 1942
Almy, G.M.; Beiler, A.C., Potential energy curve of the excited state of KH, Phys. Rev., 1942, 61, 476. [all data]

Bartky, 1966
Bartky, I.R., The A1«SIGMA»-X1«SIGMA» transition of 39KH and 39KD. Vibrational numbering and molecular constants, J. Mol. Spectrosc., 1966, 20, 299. [all data]

Cruse and Zare, 1974
Cruse, J.A.; Zare, R.N., Fluorescence of the KH molecule, J. Chem. Phys., 1974, 60, 1182. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Constants of diatomic molecules, References