Hydrazine, methyl-

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Phase change 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tboil364.KN/AMajer and Svoboda, 1985 
Quantity Value Units Method Reference Comment
Ttriple220.79KN/AAston, Finke, et al., 1951Uncertainty assigned by TRC = 0.02 K; TRC
Quantity Value Units Method Reference Comment
Δvap9.68kcal/molN/AMajer and Svoboda, 1985 
Δvap9.648kcal/molVAston, Fink, et al., 1951ALS

Enthalpy of vaporization

ΔvapH (kcal/mol) Temperature (K) Method Reference Comment
9.6479298.15N/AAston, Fink, et al., 1951, 2P = 6.62 kPa; DH
8.633364.N/AMajer and Svoboda, 1985 
9.99286.AStephenson and Malanowski, 1987Based on data from 274. - 299. K. See also Aston, Fink, et al., 1951, 2.; AC

Entropy of vaporization

ΔvapS (cal/mol*K) Temperature (K) Reference Comment
32.359298.15Aston, Fink, et al., 1951, 2P; DH

Antoine Equation Parameters

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

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Temperature (K) A B C Reference Comment
275.11 - 298.323.962161115.19-81.502Aston, Fink, et al., 1951, 2Coefficents calculated by NIST from author's data.

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Reference Comment
2.4900220.79Aston, Fink, et al., 1951, 2DH
2.490220.8Domalski and Hearing, 1996AC

Entropy of fusion

ΔfusS (cal/mol*K) Temperature (K) Reference Comment
11.28220.79Aston, Fink, et al., 1951, 2DH

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:


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.

Majer and Svoboda, 1985
Majer, V.; Svoboda, V., Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]

Aston, Finke, et al., 1951
Aston, J.G.; Finke, H.L.; Janz, G.J.; Russell, K.E., The Heat Capacity, Heats of Fusion and Vaporization, Vapor Pressures, Entropy and Thermodynamic Functions of Methylhydrazine, J. Am. Chem. Soc., 1951, 73, 1939. [all data]

Aston, Fink, et al., 1951
Aston, J.G.; Fink, H.L.; Janz, G.J.; Russell, K.E., The heat capacity, heats of fusion and vaporization, vapor pressures, entropy and thermodynamic functions of methylhydrazine, J. Am. Chem. Soc., 1951, 73, 1939-19. [all data]

Aston, Fink, et al., 1951, 2
Aston, J.G.; Fink, H.L.; Janz, G.J.; Russell, K.E., The heat capacity, heats of fusion and vaporization, vapor pressures, entropy and thermodynamic functions of methyl hydrazine, J. Am. Chem. Soc., 1951, 73, 1939-1943. [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]


Notes

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