Phosphorus: enthalpies and thermodynamics

Temperatures

Enthalpies

Thermodynamic data

State Δf Δf CpH 298.15‑H°0
Units kJ mol‑1 kJ mol‑1 J K‑1 mol‑1 J K‑1 mol‑1 kJ mol‑1
Solid (P4 *0 0 *41.09 ± 0.25 23.84 *5.360 ± 0.015
Solid (red) -18 -12 22.8 21.2 3.61
Gas *316.5 ± 1.0 278.3 *163.199 ± 0.003 20.79 *6.197 ± 0.001
Gas (P2) *144.0 ± 2.0 104 *218.123 ± 0.004 32.0 *8.904 ± 0.001
Gas (P4) *58.9 ± 0.3 24.5 *280.01 ± 0.50 67.2 *14.10 ± 0.20

Notes

This table gives a few thermodynamic data. Most values are those given in the NBS technical notes (reference 1) after conversion from the units used within those notes. Values labelled with an asterisk (*) are Committee on Data for Science and Technology (CODATA) agreed values for the thermodynamic properties of key chemical substances (reference 2). These values are published in a number of places including the WWW (reference 3).

References

  1. R.H. Schumm, D.D. Wagman, S. Bailey, W.H. Evans, and V.B. Parker in National Bureau of Standards (USA) Technical Notes 270-1 to 270-8, 1973.
  2. J.D. Cox, DD., Wagman, and V.A. Medvedev, CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, USA, 1989.
  3. http://www.codata.info/resources/databases/key1.html

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