Heat capacities and densities of α,ω-dibromoalkanes as functions of temperature

Chorążewski, Mirosław; Tkaczyk, Mariola; Góralski, Paweł

doi:10.1016/s0378-3812(00)00415-5

Cited by 16 publications

(24 citation statements)

References 6 publications

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“…Seventy values of C p (determined every 1 K) were taken into consideration for every compound. The nonzero coefficients (a 0 , b 0 , and b 1 ) are collected in Table 3 and compared with corresponding values calculated earlier 6 for R,ω-dibromoalkanes. The standard deviation of the fit was 0.5 J‚mol -1 ‚K -1 with a maximum deviation of 1.0 J‚mol -1 ‚K -1 .…”

Section: Resultsmentioning

confidence: 98%

“…This prompted us to continue our earlier study on C p measurements for halogenoalkanes. The main objective of this paper was to determine the heat capacities of five α , ω -dichloroalkanes, namely, 1,2-dichloroethane (DClEt), 1,3-dichloropropane (DClPr), 1,4-dichlorobutane (DClBu), 1,5-dichloropentane (DClPe), and 1,6-dichlorohexane (DClHx), in the temperature range from (284.15 to 353.15) K.…”

Section: Introductionmentioning

confidence: 99%

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Heat Capacities of α,ω-Dichloroalkanes at Temperatures from 284.15 K to 353.15 K and a Group Additivity Analysis

2003

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Heat capacities at constant pressure of five R,ω-dichloroalkanes (1,2-dichloroethane, 1,3-dichloropropane, 1,4-dichlorobutane, 1,5-dichloropentane, 1,6-dichlorohexane) were measured at temperatures ranging from 284 K to 353 K by using a highly sensitive Tian-Calvet differential scanning microcalorimeter (DSC). Changes in the standard procedures increased the accuracy of C p measurements. The influence of the evaporation heat effect on the C p value is analyzed. In the described method, the uncertainty of the measurements is estimated to be (0.15% for uncertainties arising solely from the measurement system and method. The group contributions to C p for CH 2 and Cl and their temperature dependence were determined by a group additivity analysis.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Heat Capacities of α,ω-Dichloroalkanes at Temperatures from 284.15 K to 353.15 K and a Group Additivity Analysis

2003

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“…Thus, systematic studies of the single-and multicomponent systems containing dibromoalkanes have been undertaken. For the pure dibromoalkanes, the attention has been focused on the improvement of group contributions for the estimation of heat capacities [6]. Investigations of the 1,5-dibromopentane + heptane and 1,2-dibromoethane + heptane mixtures revealed that the systems were thermodynamically non-ideal [7][8][9].…”

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confidence: 99%

Thermodynamic and Acoustic Properties of Mixtures of Dibromomethane + Heptane

et al. 2010

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Densities and speeds of ultrasound in binary mixtures of dibromomethane with heptane have been measured within the temperature range from 288.15 K to 318.15 K. From the experimental data, the thermodynamic excess volume, molar isobaric expansion, molar isentropic compression, and ultrasonic speed were calculated. The excess volume and excess isentropic compression have opposite signs, whereas the excess isobaric expansion is an S-shaped function of the mole fraction. An explanation was suggested to account for the excesses in terms of intermolecular interactions. It involved energetic and steric factors. Moreover, it was shown that the positive excess sound speed results almost entirely from the negative excess compression.

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“…Recently, a variety of data have been obtained for the series of consequent lengths in chains of bromo-substituted alkanes and different numbers of bromine atoms per molecule [8,9,10,11,12,13]. Some gaps in these datasets are filled and presented in the article.…”

Section: Introductionmentioning

confidence: 99%

Isobaric Heat Capacity, Isothermal Compressibility and Fluctuational Properties of 1-Bromoalkanes

et al. 2016

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We present results of the experimental measurements of the isobaric heat capacity for 1-bromohexane, 1-bromoheptane, 1-bromooctane, 1-bromononane, 1-bromodecane, 1-bromoundecane, 1-bromododecane and 1-bromo-tetradecane at normal pressure and the speed of sound and the density for 1-bromotetradecane within the temperature range 298.15-423.15 K. These data on the isobaric heat capacity and the literature-based reference data for the density and the speed of sound were used to calculate the isothermal compressibility and the inverse reduced fluctuations. Based on the comparison of the results for pure n-alkanes and α, ω-dibromoalkanes, we discuss the influence of bromine atom on the volume fluctuations.

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Heat capacities and densities of α,ω-dibromoalkanes as functions of temperature

Cited by 16 publications

References 6 publications

Heat Capacities of α,ω-Dichloroalkanes at Temperatures from 284.15 K to 353.15 K and a Group Additivity Analysis

Heat Capacities of α,ω-Dichloroalkanes at Temperatures from 284.15 K to 353.15 K and a Group Additivity Analysis

Thermodynamic and Acoustic Properties of Mixtures of Dibromomethane + Heptane

Isobaric Heat Capacity, Isothermal Compressibility and Fluctuational Properties of 1-Bromoalkanes

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