Adiabatic Calorimeter for Determination of Cryoscopic Data

Mastrangelo, S. V. R.

doi:10.1021/ac60125a032

Cited by 34 publications

(7 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…12.13 kJ.mo1-I [39]. Our value A, !, H;= 18.87k0.21 kJ .mol-' for 2-iso-propyl-5-methylphenol reproduced the average of the previous determinations: 20.5k0.6 kJ.mol-' [40]; 22.18k0.54 kJ.mo1-l [41]; and 17.28 kJ-mol-' [42].…”

Section: Enthalpy Of Fusionmentioning

confidence: 71%

Determination of the ortho‐, para‐, and meta‐Interactions in secondary‐Alkylphenols from Thermochemical Measurements

Verevkin

1998

Ber Bunsenges Phys Chem

View full text Add to dashboard Cite

The standard molar enthalpies of formation ΔfH0m, (1 or cr) at the temperature 298.15 K were measured by using combustion calorimetry for 4‐ethylphenol, 2‐iso‐propylphenol, 2‐iso‐propyl‐5‐methylphenol, 2‐sec‐butyl‐phenol, 4‐iso‐propylphenol, 4‐sec‐butylpnenol, and 4‐cyclo‐hexylphenol. The enthalpy of formation ΔfH0m, (1) of 3‐iso‐propylphenol was obtained from the results of calorimetric and equilibrium studies. The standard molar enthalpies of sublimation (or vaporization) of these compounds, and also of phenol, were obtained from the temperature dependence of the vapour pressure measured in a flow system. Molar enthalpies of fusion Δ1crH0m of the solid compounds were measured by d.s.c. Resulting values of ΔfH0m (g) were obtained at the temperature 298.15 K and used to derive strain enthalpies of alkylphenols. The intra‐molecular interactions of the substituents were discussed in terms of deviations of ΔfH0m (g) from the group additivity rules. Ortho‐, para‐, and meta‐interactions of sec‐alkyl substituent with OH‐group in the gaseous phase was found to be equal 3.9 kJ·mol−1. These values provided a further improvement on the group‐contribution methodology for estimation of thermodynamic properties of organic compounds.

show abstract

Section: Enthalpy Of Fusionmentioning

confidence: 71%

Determination of the ortho‐, para‐, and meta‐Interactions in secondary‐Alkylphenols from Thermochemical Measurements

Verevkin

1998

Ber Bunsenges Phys Chem

View full text Add to dashboard Cite

show abstract

“…and gave the interpolating equation: log P = 6.84577 -1606.529 / (i + 187.227) (2) for which a residual standard deviation of 0.348 torr was calculated. To evaluate continuity and agreement, their data were pooled with the authors' and an interpolating equation was developed: log P = 7.01065 -1733.71/ (í + 201.859) (3) with a residual standard deviation of 0.395 torr.…”

Section: Resultsmentioning

confidence: 99%

“…The melting point was 80.282°± 0.005°C. Using the cryoscopic data of Mastrangelo (3), this implies an impurity level of 0.01 mole %.…”

Section: Methodsmentioning

confidence: 99%

Vapor pressure of naphthalene. Measurements between 40.deg. and 180.deg.

Fowler¹,

Trump²,

Vogler³

1968

J. Chem. Eng. Data

View full text Add to dashboard Cite

“…mol −1 can be now also used for calculation Consequently, using the evaluated fusion enthalpy we can establish the consistency or inconsistency of all three phase transitions: solid-liquid, solid-gas, and liquid gas. There are five original papers on fusion enthalpies of Δ l cr H o m (T fus ) [36,[46][47][48][49] (see Table 5). Uncertainties in the available results were not always reported.…”

Section: Thermochemistry Of Phenolmentioning

confidence: 99%

Weaving a web of reliable thermochemistry around lignin building blocks: phenol, benzaldehyde, and anisole

Verevkin

2021

J Therm Anal Calorim

View full text Add to dashboard Cite

Substituted benzenes such as phenol, benzaldehyde, and anisole are the simplest fragments from the lignin separation feedstocks. We have collected available primary experimental results on vapour pressures, enthalpies of phase transition, and enthalpies of combustion of phenol, benzaldehyde, and anisole. The resulting data on the gas-phase standard molar enthalpies of formation were validated using the quantum chemical method G4. The consistent sets of evaluated thermodynamic data are essential for calculating the energy balances of lignin conversion in the value-added chemicals and materials. Graphic abstract

show abstract

Adiabatic Calorimeter for Determination of Cryoscopic Data

Cited by 34 publications

References 16 publications

Determination of the ortho‐, para‐, and meta‐Interactions in secondary‐Alkylphenols from Thermochemical Measurements

Determination of the ortho‐, para‐, and meta‐Interactions in secondary‐Alkylphenols from Thermochemical Measurements

Vapor pressure of naphthalene. Measurements between 40.deg. and 180.deg.

Weaving a web of reliable thermochemistry around lignin building blocks: phenol, benzaldehyde, and anisole

Contact Info

Product

Resources

About