Heat Capacity and Standard Thermodynamic Functions of Triphenylantimony Dimethacrylate over the Temperature Range from (0 to 400) K

被引：19

作者：

Markin, Alexey V. ^{[1
]}

Letyanina, Irina A. ^{[1
]}

Ruchenin, Vitaly A. ^{[1
]}

Smirnova, Natalia N. ^{[1
]}

Gushchin, Alexey V. ^{[1
]}

Shashkin, Dmitry V. ^{[1
]}

机构：

[1] Nizhnii Novgorod State Univ, Nizhnii Novgorod 603950, Russia

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2011年 / 56卷 / 09期

关键词：

Topology - Temperature - Calorimeters - Entropy - Fractal dimension - Melting - Differential scanning calorimetry;

D O I：

10.1021/je200508x

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Heat capacities of triphenylantimony dimethacrylate Ph3Sb(O2CCMe=CH2)(2) were measured by precision adiabatic vacuum calorimetry over the temperature range from T = (6 to 335) K and by differential scanning calorimetry over the temperature range from T = (300 to 470) K The melting of the sample was observed within the above temperature range. The melting was accompanied by a compound decomposition. On the obtained data, the standard thermodynamic functions of molar heat capacity C-p,m(o), enthalpy H-o (T) - H-o (0), entropy S-o (T), and Gibbs energy G(o) (T) - H-o (0) of Ph3Sb(O2CCMe=CH2)(2) were calculated over the range from T = (0 to 400) K The low-temperature (T < 50 K) heat capacity dependence was analyzed on the basis of Debye's heat capacity theory of solids and its multifractal model, so the characteristic temperatures and the fractal dimension were determined, and some conclusions about the structure topology were made. The standard entropy of formation at T = 298.15 K of Ph3Sb(O2CCMe=CH2)(2)(cr) was calculated.

引用

页码：3657 / 3662

页数：6

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