Isochoric heat capacity, phase transition and derived key thermodynamic properties of methyl decanoate

Fuel ◽  
2022 ◽  
Vol 310 ◽  
pp. 122251
Author(s):  
Ilmutdin M. Abdulagatov ◽  
Nikolai G. Polikhronidi ◽  
Rabiyat G. Batyrova ◽  
Marzena Dzida
Keyword(s):  
Phase Transition ◽  
Heat Capacity ◽  
Thermodynamic Properties ◽  
Isochoric Heat Capacity ◽  
Methyl Decanoate

Isochoric heat capacity of near- and supercritical benzene and derived thermodynamic properties

2020 ◽  
Vol 313 ◽  
pp. 113204
Author(s):  
N.G. Polikhronidi ◽  
R.G. Batyrova ◽  
J.W. Magee ◽  
I.M. Abdulagatov
Keyword(s):  
Heat Capacity ◽  
Thermodynamic Properties ◽  
Isochoric Heat Capacity

scholarly journals Thermodynamic properties of black holes in de Sitter space

2016 ◽  
Vol 32 (02) ◽  
pp. 1750017 ◽  
Author(s):  
Huai-Fan Li ◽  
Meng-Sen Ma ◽  
Ya-Qin Ma
Keyword(s):  
Phase Transition ◽  
Black Holes ◽  
Heat Capacity ◽  
Black Hole ◽  
Thermodynamic Properties ◽  
Thermodynamic Quantities ◽  
De Sitter ◽  
First Law Of Thermodynamics ◽  
Effective Temperatures ◽  
Sds Black Hole

We study the thermodynamic properties of Schwarzschild–de Sitter (SdS) black hole and Reissner–Nordström–de Sitter (RNdS) black hole in view of global and effective thermodynamic quantities. Making use of the effective first law of thermodynamics, we can derive the effective thermodynamic quantities of de Sitter black holes. It is found that these effective thermodynamic quantities also satisfy Smarr-like formula. Especially, the effective temperatures are nonzero in the Nariai limit. By calculating heat capacity and Gibbs free energy, we find SdS black hole is always thermodynamically stable and RNdS black hole may undergoes phase transition at some points.

Thermodynamic Properties of EuCl2 and the NaCl-EuCl2 System

2001 ◽  
Vol 56 (9-10) ◽  
pp. 647-652 ◽  
Author(s):  
F. Da Silva ◽  
L. Rycerz ◽  
M. Gaune-Escard
Keyword(s):  
Phase Transition ◽  
Phase Diagram ◽  
Differential Scanning Calorimetry ◽  
Heat Capacity ◽  
Thermodynamic Properties ◽  
Linear Equation ◽  
Scanning Calorimetry ◽  
Temperature Range

Abstract The temperature and enthalpy of the phase transition and fusion of EuCl2 were determined and found to be 1014 K, 11.5 kJ mol-1and 1125 K, 18.7 kJ mol-1 , respectively. Addition­ ally, the heat capacity of solid EuCl2 was measured by Differential Scanning Calorimetry in the temperature range 306 -1085 K. The results were fitted to the linear equation C0p,m = (68.27 + 0.0255 T/K) J mol -1 K-1 in the temperature range 306 -900 K. Due to discrepancies in the liter­ ature on the temperature of fusion of EuCl2, the determination of the NaCl-EuCl2 phase diagram was repeated. It consists of a simple eutectic equilibrium at Teut = 847 K with x(EuCl2) = 0.49.

scholarly journals Heat Capacity and Thermodynamic Properties of Cesium Pentaborate Tetrahydrate

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Kangrui Sun ◽  
Panpan Li ◽  
Long Li ◽  
Yafei Guo ◽  
Tianlong Deng
Keyword(s):  
Phase Transition ◽  
Heat Capacity ◽  
Free Energy ◽  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Molar Heat Capacity ◽  
Polynomial Equation ◽  
Adiabatic Calorimeter ◽  
Nitrogen Atmosphere ◽  
Thermal Anomalies

This paper reports the molar heat capacities of β-CsB5O8·4H2O, which were measured by an accurate adiabatic calorimeter from 298 to 373 K with a heating rate of 0.1 K/min under nitrogen atmosphere. Neither phase transition nor thermal anomalies were observed. The molar heat capacity against temperature was fitted to a polynomial equation of Cp,m (J·mol−1·K−1) = 618.07702 + 39.52669[T − (Tmax + Tmin)/2]/(Tmax − Tmin)/2] − 3.46888[(T − (Tmax + Tmin)/2)/(Tmax − Tmin)/2]2 + 7.9441[(T − (Tmax+ Tmin)/2)/(Tmax − Tmin)/2]3. The relevant thermodynamic functions of enthalpy (HT − H298.15), entropy (ST − S298.15), and Gibbs free energy (GT − G298.15) of cesium pentaborate tetrahydrate from 298 to 375 K of 5 K intervals are also obtained on the basis of relational expression equations between thermodynamic functions and the molar heat capacity.

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