Hydrazine, 1,2-dimethyl-

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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.

Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Δcliquid-1983.0 ± 4.2kJ/molCcbAston, Rock, et al., 1952Reanalyzed by Cox and Pilcher, 1970, Original value = -1980.93 kJ/mol; ALS
Quantity Value Units Method Reference Comment
liquid199.15J/mol*KN/AAston, Janz, et al., 1951DH

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference Comment
171.04298.15Aston, Janz, et al., 1951T = 15 to 298 K.; DH

Phase change data

Go To: Top, Condensed phase thermochemistry data, Mass spectrum (electron ionization), 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, Chris Muzny director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil360.2KN/AMajer and Svoboda, 1985 
Quantity Value Units Method Reference Comment
Ttriple264.28KN/AAston, Janz, et al., 1951, 2Uncertainty assigned by TRC = 0.04 K; TRC
Quantity Value Units Method Reference Comment
Δvap39.5kJ/molN/AMajer and Svoboda, 1985 
Δvap39.33 ± 0.063kJ/molVAston, Janz, et al., 1951, 3ALS

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
35.16360.2N/AMajer and Svoboda, 1985 
41.0286.AStephenson and Malanowski, 1987Based on data from 274. to 297. K. See also Aston, Janz, et al., 1951 and Boublik, Fried, et al., 1984.; AC

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
274.52 to 297.612.96404707.722-120.979Aston, Janz, et al., 1951Coefficents calculated by NIST from author's data.

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Reference Comment
13.638264.28Aston, Janz, et al., 1951DH
13.64264.3Domalski and Hearing, 1996AC

Entropy of fusion

ΔfusS (J/mol*K) Temperature (K) Reference Comment
51.60264.28Aston, Janz, et al., 1951DH

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Mass spectrum (electron ionization)

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

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Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin MASS SPECTROMETRY CENTER, UNIV. OF UTAH, ALDRICH D16180-2
NIST MS number 52263

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References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), Notes

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

Aston, Rock, et al., 1952
Aston, J.G.; Rock, E.J.; Isserow, S., The heats of combustion of the methyl substituted hydrazines and some observations on the burning of volatile liquids, J. Am. Chem. Soc., 1952, 74, 2484-24. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Aston, Janz, et al., 1951
Aston, J.G.; Janz, G.J.; Russell, K.E., The heat capacity, heats of fusion and vaporization, vapor pressures and entropy of symmetrical dimethylhydrazine, J. Am. Chem. Soc., 1951, 73, 1943-1945. [all data]

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, Janz, et al., 1951, 2
Aston, J.G.; Janz, G.J.; Russell, K.E., The Heat Capacity, Heats of Fusion and Vaporization, Vapor Pressures and Entropy of Symmetrtical Dimethylhydrazine, J. Am. Chem. Soc., 1951, 73, 1943. [all data]

Aston, Janz, et al., 1951, 3
Aston, J.G.; Janz, G.J.; Russell, K.E., The heat capacity, heats of fusion and vaporization, vapor pressures and entropy of symmetrical dimethylhydrazine, J. Am. Chem. Soc., 1951, 73, 1943-19. [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]

Boublik, Fried, et al., 1984
Boublik, T.; Fried, V.; Hala, E., The Vapour Pressures of Pure Substances: Selected Values of the Temperature Dependence of the Vapour Pressures of Some Pure Substances in the Normal and Low Pressure Region, 2nd ed., Elsevier, New York, 1984, 972. [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

Go To: Top, Condensed phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), References