potassium hydride

• Formula: HK
• Molecular weight: 40.1062
• IUPAC Standard InChI: InChI=1S/K.H Copy

  
• IUPAC Standard InChIKey: NTTOTNSKUYCDAV-UHFFFAOYSA-N Copy
• CAS Registry Number: 7693-26-7
• Chemical structure:
  This structure is also available as a 2d Mol file
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• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • Constants of diatomic molecules
  • References
  • Notes
• Other data available:
  • Gas phase ion energetics data
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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.

Gas Phase Heat Capacity (Shomate Equation)

C_p° = 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
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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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.

Solid Phase Heat Capacity (Shomate Equation)

C_p° = 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
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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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^- +  =

By formula: K^- + H⁺ = HK

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

Notes

References

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

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]

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 A¹Σ-X¹Σ 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

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• Symbols used in this document:
  

  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  S°solid	Entropy of solid at standard conditions
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfH°solid	Enthalpy of formation of solid at standard conditions
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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