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potassium

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Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, 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
Deltafgas89.0 ± 0.8kJ/molReviewCox, Wagman, et al., 1984CODATA Review value
Deltafgas89.00kJ/molReviewChase, 1998Data last reviewed in December, 1961
Quantity Value Units Method Reference Comment
gas,1 bar160.341 ± 0.003J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
gas,1 bar160.34J/mol*KReviewChase, 1998Data last reviewed in December, 1961

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) 1039.54 - 1800.1800. - 6000.
A 20.6612258.70570
B 0.391869-27.38277
C -0.4173446.730509
D 0.145582-0.420844
E 0.003764-25.87921
F 82.8386032.37931
G 185.2650198.3777
H 88.9999688.99996
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in December, 1961 Data last reviewed in December, 1961

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, 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
Deltafliquid2.27kJ/molReviewChase, 1998Data last reviewed in December, 1961
Quantity Value Units Method Reference Comment
liquid,1 bar71.40J/mol*KReviewChase, 1998Data last reviewed in December, 1961
Quantity Value Units Method Reference Comment
solid,1 bar64.68 ± 0.20J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
Quantity Value Units Method Reference Comment
solid64.63J/mol*KReviewChase, 1998Data last reviewed in December, 1961

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

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Temperature (K) 336.35 - 1039.54
A 40.27113
B -30.54542
C 26.49505
D -5.727854
E -0.063477
F -8.812467
G 127.7614
H 2.270005
ReferenceChase, 1998
Comment Data last reviewed in December, 1961

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. - 336.35
A -63.47410
B -3226.340
C 14644.60
D -16229.50
E 16.29410
F 119.6480
G 533.8780
H 0.000000
ReferenceChase, 1998
Comment Data last reviewed in December, 1961

Phase change data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction 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 as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director

Quantity Value Units Method Reference Comment
Tboil1037.KN/AHonig and Kramer, 1969Uncertainty assigned by TRC = 1. K; TRC
Quantity Value Units Method Reference Comment
Ttriple336.35KN/AHonig and Kramer, 1969Uncertainty assigned by TRC = 0.1 K; TRC

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Temperature (K) A B C Reference Comment
679.4 - 1033.04.457184691.5824.195Fiock and Rodebush, 1926Coefficents calculated by NIST from author's data.

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change 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: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

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

(Potassium ion (1+) bullet 10potassium) + potassium = (Potassium ion (1+) bullet 11potassium)

By formula: (K+ bullet 10K) + K = (K+ bullet 11K)

Quantity Value Units Method Reference Comment
Deltar54.0kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 11potassium) + potassium = (Potassium ion (1+) bullet 12potassium)

By formula: (K+ bullet 11K) + K = (K+ bullet 12K)

Quantity Value Units Method Reference Comment
Deltar56.1kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 12potassium) + potassium = (Potassium ion (1+) bullet 13potassium)

By formula: (K+ bullet 12K) + K = (K+ bullet 13K)

Quantity Value Units Method Reference Comment
Deltar56.1kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 13potassium) + potassium = (Potassium ion (1+) bullet 14potassium)

By formula: (K+ bullet 13K) + K = (K+ bullet 14K)

Quantity Value Units Method Reference Comment
Deltar62.3kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 14potassium) + potassium = (Potassium ion (1+) bullet 15potassium)

By formula: (K+ bullet 14K) + K = (K+ bullet 15K)

Quantity Value Units Method Reference Comment
Deltar54.8kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 15potassium) + potassium = (Potassium ion (1+) bullet 16potassium)

By formula: (K+ bullet 15K) + K = (K+ bullet 16K)

Quantity Value Units Method Reference Comment
Deltar62.8kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 16potassium) + potassium = (Potassium ion (1+) bullet 17potassium)

By formula: (K+ bullet 16K) + K = (K+ bullet 17K)

Quantity Value Units Method Reference Comment
Deltar64.9kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 17potassium) + potassium = (Potassium ion (1+) bullet 18potassium)

By formula: (K+ bullet 17K) + K = (K+ bullet 18K)

Quantity Value Units Method Reference Comment
Deltar67.4kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 18potassium) + potassium = (Potassium ion (1+) bullet 19potassium)

By formula: (K+ bullet 18K) + K = (K+ bullet 19K)

Quantity Value Units Method Reference Comment
Deltar65.7kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 19potassium) + potassium = (Potassium ion (1+) bullet 20potassium)

By formula: (K+ bullet 19K) + K = (K+ bullet 20K)

Quantity Value Units Method Reference Comment
Deltar72.4kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 20potassium) + potassium = (Potassium ion (1+) bullet 21potassium)

By formula: (K+ bullet 20K) + K = (K+ bullet 21K)

Quantity Value Units Method Reference Comment
Deltar54.0kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 21potassium) + potassium = (Potassium ion (1+) bullet 22potassium)

By formula: (K+ bullet 21K) + K = (K+ bullet 22K)

Quantity Value Units Method Reference Comment
Deltar59.8kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 22potassium) + potassium = (Potassium ion (1+) bullet 23potassium)

By formula: (K+ bullet 22K) + K = (K+ bullet 23K)

Quantity Value Units Method Reference Comment
Deltar56.9kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 23potassium) + potassium = (Potassium ion (1+) bullet 24potassium)

By formula: (K+ bullet 23K) + K = (K+ bullet 24K)

Quantity Value Units Method Reference Comment
Deltar61.9kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 9potassium) + potassium = (Potassium ion (1+) bullet 10potassium)

By formula: (K+ bullet 9K) + K = (K+ bullet 10K)

Quantity Value Units Method Reference Comment
Deltar54.8kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 2potassium) + potassium = (Potassium ion (1+) bullet 3potassium)

By formula: (K+ bullet 2K) + K = (K+ bullet 3K)

Quantity Value Units Method Reference Comment
Deltar43.5kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 3potassium) + potassium = (Potassium ion (1+) bullet 4potassium)

By formula: (K+ bullet 3K) + K = (K+ bullet 4K)

Quantity Value Units Method Reference Comment
Deltar64.9kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 4potassium) + potassium = (Potassium ion (1+) bullet 5potassium)

By formula: (K+ bullet 4K) + K = (K+ bullet 5K)

Quantity Value Units Method Reference Comment
Deltar52.3kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 5potassium) + potassium = (Potassium ion (1+) bullet 6potassium)

By formula: (K+ bullet 5K) + K = (K+ bullet 6K)

Quantity Value Units Method Reference Comment
Deltar72.4kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 6potassium) + potassium = (Potassium ion (1+) bullet 7potassium)

By formula: (K+ bullet 6K) + K = (K+ bullet 7K)

Quantity Value Units Method Reference Comment
Deltar56.1kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 7potassium) + potassium = (Potassium ion (1+) bullet 8potassium)

By formula: (K+ bullet 7K) + K = (K+ bullet 8K)

Quantity Value Units Method Reference Comment
Deltar87.0kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

(Potassium ion (1+) bullet 8potassium) + potassium = (Potassium ion (1+) bullet 9potassium)

By formula: (K+ bullet 8K) + K = (K+ bullet 9K)

Quantity Value Units Method Reference Comment
Deltar48.1kJ/molPDissBrechignac, Cahuzac, et al., 1990gas phase

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Notes

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

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Honig and Kramer, 1969
Honig, R.E.; Kramer, D.A., Vapor pressure data for the solid and liquid elements, RCA Rev., 1969, 1969, 285. [all data]

Fiock and Rodebush, 1926
Fiock, E.F.; Rodebush, W.H., The Vapor Pressures and Thermal Properties of Potassium and Some Alkali Halides, J. Am. Chem. Soc., 1926, 48, 10, 2522-2528, https://doi.org/10.1021/ja01421a006 . [all data]

Brechignac, Cahuzac, et al., 1990
Brechignac, C.; Cahuzac, P.; Carlier, F.; De Frutos, M.; Leyniger, J., Cohesive Energies of (K)n+ 5<n<200 from Photoevaporation Experiments, J. Chem. Phys., 1990, 93, 10, 7449, https://doi.org/10.1063/1.459418 . [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, References