Thermodynamics of dibenzo-p-dioxin and 1,2,3,4-tetrachlorodibenzo-p-dioxin fromT = 5 K toT = 490 K |
| |
| Institution: | 1. Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai, India;2. Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India;1. Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba, Sendai, Miyagi 980-8577, Japan;2. Graduate School of Engineering, Tohoku University, 6-6 Aramaki Aza Aoba, Aoba, Sendai, Miyagi 980-8579, Japan;3. Research Alliance Center for Mathematical Science, Tohoku University, 6-3 Aramaki Aza Aoba, Aoba, Sendai, Miyagi 980-8578, Japan |
| |
| Abstract: | In adiabatic low-pressure and dynamic calorimeters the temperature dependence of the standard molar heat capacity Cp, moof dibenzo- p -dioxin and 1,2,3,4-tetrachlorodibenzo- p -dioxin have been determined at temperatures in the range T = 5 K to T = 490 K: from T = 5 K to T = 340 K with an accuracy of about 0.2 per cent and with an accuracy of 0.5 per cent to 1.5 per cent between T = 340 K and T = 490 K. The temperatures, enthalpies, and entropies of melting of the above compounds have been determined. The experimental data were used to calculate the thermodynamic functions Cp, mo / R, Δ0THmo / (R·K), Δ0TSmo / R, and Φmo = Δ0TSmo − Δ0THmo / T(where R is the universal gas constant) in the range T → 0 to T = 490 K. The isochoric heat capacity CV, mof both dioxins has been estimated over the range T → 0 to Tfus. The effect of substitution of four hydrogen atoms by chlorine atoms on the lattice and atomic components of the isochoric heat capacity was considered. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
