Thermodynamic characteristics of solutions of ornidazole in different organic solvents at different temperatures

2014 ◽  
Vol 191 ◽  
pp. 124-127 ◽  
Author(s):  
K.D. Bhesaniya ◽  
K.V. Chavda ◽  
C.H. Sadhu ◽  
S. Baluja
Keyword(s):  
Organic Solvents ◽  
Thermodynamic Characteristics ◽  
Different Temperatures

Correlation between global thermodynamic functions and experimental data in multicomponent heterogeneous systems

2016 ◽  
Vol 94 (2) ◽  
pp. 113-119 ◽  
Author(s):  
Igor Povar ◽  
Oxana Spinu
Keyword(s):  
Experimental Data ◽  
Thermodynamic Functions ◽  
Solid Phase ◽  
Heterogeneous Systems ◽  
Thermodynamic Characteristics ◽  
Alkaline Solutions ◽  
Precipitation Process ◽  
Mutual Transformation ◽  
Homogeneous Solutions ◽  
Different Temperatures

The correlation between global thermodynamic functions and such experimental data, which quantitatively characterize the precipitation–dissolution processes of sparingly soluble compounds, as the degree of precipitation and residual concentrations of the solid-phase components in saturated solutions under real conditions, taking into account the complex formation reactions, has been deducted. The paper intends also to introduce widely formal thermodynamic methods for forecasting the conditions of mutual transformation of solid phases through chemical synthesis by precipitation methods, optimization of coprecipitation methods, fractional precipitation from homogeneous solutions, and separation and analysis of chemical compounds. Within the method of residual concentrations, the thermodynamic parameters of the process of precipitating cadmium ions with potassium decanoate from acid and alkaline solutions for different temperatures were investigated. On the basis of the experimentally determined degree of precipitation and its dependence on temperature, the temperature coefficients and overall thermodynamic characteristics of the precipitation process ([Formula: see text], [Formula: see text], and [Formula: see text]) were determined. The optimum conditions of the investigated process of precipitation have been established.

Measurement and Modeling of Solubility of para-tert-Butylbenzoic Acid in Pure and Mixed Organic Solvents at Different Temperatures

2017 ◽  
Vol 62 (4) ◽  
pp. 1411-1421 ◽  
Author(s):  
Vineet Aniya ◽  
Debiparna De ◽  
Abdul Muqeet Mohammed ◽  
Prathap K. Thella ◽  
Bankupalli Satyavathi
Keyword(s):  
Organic Solvents ◽  
Different Temperatures

Solubilities of Betulin in Fourteen Organic Solvents at Different Temperatures

2007 ◽  
Vol 52 (4) ◽  
pp. 1366-1368 ◽  
Author(s):  
Dan Cao ◽  
Guoling Zhao ◽  
Weidong Yan
Keyword(s):  
Organic Solvents ◽  
Different Temperatures

scholarly journals Thermodynamic Characteristics of Methane Adsorption of Coal with Different Initial Gas Pressures at Different Temperatures

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Tingting Cai ◽  
Zengchao Feng ◽  
Yulong Jiang ◽  
Dong Zhao
Keyword(s):  
Adsorption Process ◽  
Thermodynamic Characteristics ◽  
Methane Adsorption ◽  
Gas Pressure ◽  
Adsorption Heat ◽  
Mathematical Function ◽  
Adsorption Time ◽  
Free Gas ◽  
Different Temperatures ◽  
Gas Pressures

The adsorption of methane in coal depends on both pressure and temperature, and the adsorption gas content decreases as the temperature rises while increases as the pressure increases. When the gas molecule switches between the free state and adsorbed state, energy exchange is accompanied. To study the thermodynamic characteristics (adsorption heat, adsorption content, and adsorption time) of the methane adsorption of coal, the isothermal methane adsorption experiments of coal with different initial free gas pressures at different temperatures (30–90°C) were conducted. In this paper, a well-defined mathematical function of the adsorption heat was established on the basis of the actual gas state equation, Boltzmann energy distribution theory, and the two-state energy model, and the function was verified by the experimental data. The results show that the mathematical function of the adsorption heat can well describe the relationship among the adsorption heat, temperature, and initial free gas pressure in the closed adsorption system, and the adsorption heat involves the initial free gas pressure. The greater the initial free gas pressure, the less the adsorption heat is. In the adsorption process with different initial free gas pressures at different temperatures, the real-time free gas content increases with time and the adsorption system shows desorption process generally. For the adsorption process with the same initial free gas pressure, the adsorption time increases with the rising temperature. For the adsorption process with different initial free gas pressures at the same temperature, the greater the initial free gas pressure, the shorter the adsorption time it takes to reach an equilibrium state. The results help to understand the thermodynamic characteristics and the heat and mass transfer of methane in coal adsorption.

Thermodynamic aspects of some radioassays.

1976 ◽  
Vol 22 (1) ◽  
pp. 70-73 ◽  
Author(s):  
P M Keane ◽  
W H Walker ◽  
J Gauldie ◽  
G E Abraham
Keyword(s):  
Incubation Temperature ◽  
Equilibrium Constants ◽  
Thermodynamic Characteristics ◽  
Enthalpy Change ◽  
Theoretical Level ◽  
Relative Contribution ◽  
Free Binding Energy ◽  
Different Temperatures ◽  
And Control ◽  
Insight Into

Abstract In a number of radioimmunoassays and radiotransin assays, effective equilibrium constants have been measured at different temperatures in order to define the relative contribution of changes of entropy and enthalpy to the change in free binding energy. In systems with a large enthalpy component, the lowest possible incubation temperature maximizes sensitivity, and control of temperature throughout the assay is important. Conversely, when enthalpy change is small, a high temperature allows rapid attainment of equilibrium without loss of sensitivity. At a theoretical level, the thermodynamic characteristics of binding may allow some insight into the nature of the binding process.

Sign in / Sign up

Export Citation Format

Share Document