Disodium

• Formula: Na₂
• Molecular weight: 45.97953856
• IUPAC Standard InChI: InChI=1S/2Na Copy

  
• IUPAC Standard InChIKey: QXNVGIXVLWOKEQ-UHFFFAOYSA-N Copy
• CAS Registry Number: 25681-79-2
• Chemical structure:
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• Information on this page:
  • Gas phase thermochemistry data
  • Reaction thermochemistry data
  • References
  • Notes
• Other data available:
  • Gas phase ion energetics data
  • Ion clustering data
  • Constants of diatomic molecules
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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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/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: 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

Na₇⁺ +  = (Na₇⁺ • )

By formula: Na₇⁺ + Na₂ = (Na₇⁺ • Na₂)

Na₉⁺ +  = (Na₉⁺ • )

By formula: Na₉⁺ + Na₂ = (Na₉⁺ • Na₂)

Na₁₁⁺ +  = (Na₁₁⁺ • )

By formula: Na₁₁⁺ + Na₂ = (Na₁₁⁺ • Na₂)

Na₁₃⁺ +  = (Na₁₃⁺ • )

By formula: Na₁₃⁺ + Na₂ = (Na₁₃⁺ • Na₂)

Na₃⁺ +  = (Na₃⁺ • )

By formula: Na₃⁺ + Na₂ = (Na₃⁺ • Na₂)

Na₅⁺ +  = (Na₅⁺ • )

By formula: Na₅⁺ + Na₂ = (Na₅⁺ • Na₂)

References

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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]

Brechignac, Cahuzac, et al., 1989
Brechignac, C.; Cahuzac, P.; Leygnier, J.; Pfalum, R.; Roux, J.P.; Weiner, J., Stability of Alkali Cluster Ions, Z. Phys. D: At. Mol. Clusters, 1989, 12, 1-4, 199, https://doi.org/10.1007/BF01426937 . [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, 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
  ΔrH°	Enthalpy of reaction at standard conditions

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