High temperature heat capacities of the tin(II) halides measured by differential scanning calorimetry

Gardner, Peter J.; Preston, Steve R.

doi:10.1016/0040-6031(91)80043-i

Cited by 10 publications

(9 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The enthalpy changes of the reactions collected in Table were additionally evaluated according to the third-law method by the following equation: where Δ r GEF °( T ) = Δ r [ G °( T ) − H °(298)]/ T is the change of the Gibbs energy function for the reaction considered, obtained from the data of SnCl 2 (s) 45 and from the data calculated in this work for the SnCl 2 (g) and Sn 2 Cl 4 (g) gaseous species (Table ). More recent thermochemical data for SnCl 2 (s) reported in ref are in excellent agreement with the respective data in the compiled work 45 used throughout the present study. Table shows in detail the results of the third-law evaluation for run 5.…”

Section: Resultssupporting

confidence: 88%

The Dimerization of SnCl₂(g): Mass Spectrometric and Theoretical Studies

et al. 2005

View full text Add to dashboard Cite

The vaporization of SnCl2(s) was investigated in the temperature range between 382 and 504 K by the use of Knudsen effusion mass spectrometry. The Sn+, SnCl+, SnCl2+, Sn2Cl3+, and Sn2Cl4+ ions were detected in the mass spectrum of the equilibrium vapor. The SnCl2(g) and Sn2Cl4(g) gaseous species were identified, and their partial pressures were determined. The structure and vibrational properties of both species and corresponding fragmentation products were studied applying density functional theory and second-order Møller-Plesset perturbation theoretical approaches. Molecular parameters yielded thermodynamic functions by the use of statistical thermodynamics. The sublimation enthalpies of SnCl2(g) and Sn2Cl4(g) at 298 K resulting from the second- and third-law methods are evaluated as 130.9 +/- 6.2 kJ mol(-1) and 155.8 +/- 7.3 kJ mol(-1), respectively. The enthalpy changes of the dissociation reactions Sn2Cl4(g) = 2 SnCl2(g) were obtained as delta(d)H degrees(298) = 106.8 +/- 6.2 kJ mol(-1). The corresponding theoretical value amounts to 103.4 kJ mol(-1). The change of monomer properties due to the dimerization reaction is also discussed.

show abstract

Section: Resultssupporting

confidence: 88%

The Dimerization of SnCl₂(g): Mass Spectrometric and Theoretical Studies

et al. 2005

View full text Add to dashboard Cite

show abstract

“…For the gaseous species, the standard molar entropies and temperature-dependent molar heat capacities from Tables and were used. The molar heat capacities of the binary halides in the solid and liquid phases were taken from Gardner . The melting temperatures and enthalpies of fusion for the binary halides were taken from refs and with the exception of the enthalpy of fusion of SnI 2 which was chosen in the present work.…”

Section: Detailed Considerations Involved In Selected Valuesmentioning

confidence: 99%

“…The molar heat capacities of the binary halides in the solid and liquid phases were taken from Gardner . The melting temperatures and enthalpies of fusion for the binary halides were taken from refs and with the exception of the enthalpy of fusion of SnI 2 which was chosen in the present work. The standard molar enthalpies of formation and entropies for the solid phase of the binary halides were selected in accordance with their abilitywhen used in conjunction with all other necessary datato accurately reproduce the vapor pressures above the liquid phase of the respective species.…”

Section: Detailed Considerations Involved In Selected Valuesmentioning

confidence: 99%

“… a N.B. Parameters (by convention) are shown to three decimal places from results of calculations but do not imply precision to this level. b These values are obtained by substituting T = 298.15 K into the corresponding heat capacity functions in refs and . c This value is obtained by substituting T = 298.15 K into the corresponding heat capacity function in Table 6. …”

Section: Detailed Considerations Involved In Selected Valuesmentioning

confidence: 99%

See 1 more Smart Citation

Selected Thermochemical Parameters for Tin(II) Halides, SnXX′ (X, X′ = Cl, Br, I)

et al. 2009

View full text Add to dashboard Cite

The tin(II) halides are important in a number of industrial processes and technological devices, for example, in the chemical vapor deposition of tin(IV) oxide films for the semiconductor industry, in the production of catalysts, and as a method of refining the spectral output of high intensity discharge lamps. Modeling of such processes requires databases of reliable, self-consistent thermochemical parameters. A survey of the physicochemical properties and appropriate standard thermochemical data has been made for the tin(II) halides, SnXX′ (X, X′ ) Cl, Br, I), and a self-consistent set of thermochemical parameters are selected for the solid, liquid, and gas phases of these materials. In a few cases where data are simply unavailable, data are derived using a variety of estimation techniques. The benchmark employed to select the parameters in this work is that they accurately predict experimental vapor pressures where these are available. Finally, estimation techniques (Supporting Information) are used to provide supporting evidence as to the correctness of the magnitudes of data selected using the benchmark.

show abstract

“…One challenging aspect is to determine heat capacities from DCS measurements at high temperatures. Gardner and Preston (54) measured heat capacities up to 800 K for various halides.…”

Section: Thermodynamic Measurementsmentioning

confidence: 99%

Thermal analysis

Dollimore¹

1992

Anal. Chem.

View full text Add to dashboard Cite

High temperature heat capacities of the tin(II) halides measured by differential scanning calorimetry

Cited by 10 publications

References 7 publications

The Dimerization of SnCl₂(g): Mass Spectrometric and Theoretical Studies

The Dimerization of SnCl₂(g): Mass Spectrometric and Theoretical Studies

Selected Thermochemical Parameters for Tin(II) Halides, SnXX′ (X, X′ = Cl, Br, I)

Thermal analysis

Contact Info

Product

Resources

About

High temperature heat capacities of the tin(II) halides measured by differential scanning calorimetry

Cited by 10 publications

References 7 publications

The Dimerization of SnCl2(g): Mass Spectrometric and Theoretical Studies

The Dimerization of SnCl2(g): Mass Spectrometric and Theoretical Studies

Selected Thermochemical Parameters for Tin(II) Halides, SnXX′ (X, X′ = Cl, Br, I)

Thermal analysis

Contact Info

Product

Resources

About

The Dimerization of SnCl₂(g): Mass Spectrometric and Theoretical Studies

The Dimerization of SnCl₂(g): Mass Spectrometric and Theoretical Studies