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Showing 1 to 20 of 74 for “"chemical equilibrium"”.
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Chemical equilibrium and its conceptual difficulties
Abstract available p. 1-2
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An Interactive Chemical Equilibrium Solver for the Personal Computer
The Virginia Tech Equilibrium Chemistry (VTEC) code is a keyboard interactive, user friendly, chemical equilibrium solver for use on a personal computer. The code is particularly suitable for a teaching / learning environment. For a set of reactants at a defined thermodynamic state given by a user, …
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A hybrid method for flows in local chemical equilibrium and nonequilibrium
… of this work is to develop a more efficient chemically active compressible Euler equation solver. Currently, a choice between the physical accuracy of a finite-rate solver or the computational efficiency of an equilibrium flow solver must be made. The number of species modeled continues to …
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An Original Method for Computing Complex Non-Premixed Flows in Chemical Equilibrium
<p>A novel method for computing chemical equilibrium reactions in three-dimensional reacting fluid flows is introduced in this paper. The originality of the method is that continuity equations are solved for the atomic densities rather than for the molecular species densities, as is the case for …
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The spatial degree of chemical equilibrium in some high grade metamorphic rocks
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1967.
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Chemical equilibrium modeling of phosphorus removal and recovery processes for advanced wastewater treatment
… and centrate treatment process. This study used chemical equilibrium modeling to examine phosphorus removal and recovery in the centrate from dewatered anaerobic digestion sludge. The chemical equilibrium of two P recovery technologies (CNP's AirPrex P-recovery process, Ostara's Pearl® P-recovery …
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Chemical equilibrium with applications X program with user interface and visual basic programming
… program named CEA X Program that calculates the chemical equilibrium compositions of complex mixtures using a user interface created in Visual Basic. The program uses the iterative method of minimizing the Gibbs energy or the Helmholtz energy first utilized in the NASA CEA program[1]. The …
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A finite element segregated method for thermo-chemical equilibrium and nonequilibrium hypersonic flows using adapted grids
… numerical simulation of 2-D hypersonic, thermo-chemical equilibrium and nonequilibrium flows, with an emphasis on resolving directional flow features, such as shocks, by an anisotropic mesh adaptation procedure. Since the flow field of such problems is chemically reacting and molecular species …
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The development and evaluation of a computer-assisted strategy designed to change student misconceptions about chemical equilibrium
… to identify and describe misconceptions about chemical equilibrium held by Year-12 chemistry students in the Maldives. Second, to investigate the effects of using a computer-assisted instructional strategy in changing those misconceptions. A misconception idenfication test and an interview …
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Prediction of struvite formation potential in Ebpr digested sludge using mass balances, batch precipitation tests, and chemical equilibrium modeling
… using mass balances, batch tests, and chemical equilibrium modeling with the software MINEQL+.
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Da harmonia do sorriso ao equilíbrio químico: proposta de situação de ensino e aprendizagem em química.
… that could allow the interplay of concepts of chemical equilibrium and dental caries, as well as oral health education based on oral hygiene and the rationale use of fluoride. As secondary aims, it was surveyed the level of interest of high school students in Chemistry and also which topics …
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Selected factors affecting measurement of the hydraulic conductivity of geosynthetic clay liners
… suitable for use as a barrier in hydraulic and chemical containment applications. However, adverse physico-chemical interactions between the bentonite in GCLs and both the hydrating and permeating liquids may yield substantially higher k than what is typically acceptable for design (i.e., k ≤ …
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A review and application of the Hadron gas model to heavy ion collisions
… system at freeze-out. Conclusions of thermal and chemical equilibrium at freeze-out are drawn from an analysis of the data of Si-Au collisions at BNL-AGS, and compared with the literature on thermal analyses of Si-Au collisions.
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Design and operational characteristics of a gasification-combustion process: flammability model
… and power generation. Flammability limit and chemical equilibrium theory were used to model the flammable range of the gasification product in a combustion chamber. The model predicted an adiabatic flammable zone within an equivalence ratio of 0.56 to 1.67 for oak with 20 percent moisture …
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Exact conservation of quantum numbers B, S and Q in the statistical description of high energy collisions
… can be described by a hadron gas in thermal and chemical equilibrium. The exact conservation of baryon number, strangeness and charge are explicitly taken into account. For heavy ions the effect arising from the neutron surplus becomes important and leads to a substantial increase in e.g. the …
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Calculation of chemical and phase equilibria
The computation of chemical and phase equilibria is an essential aspect of chemical engineering design and development. Important applications range from flash calculations to distillation and pyrometallurgy. Despite the firm theoretical foundations on which the theory of chemical equilibrium is …
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The adsorption of Ni, Cu, Zn, Cd and Pb by δ-MnO₂ and its inclusion in an equilibrium model of metal partitioning in soils
Chemical equilibrium modelling provides a mechanistic tool for the prediction of metal partitioning in soils, which is important in predicting the fate and effects of metals in soil systems. In order to set up an equilibrium model of metal partitioning in soil systems, thermodynamic data for all …
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Hadronic gas description of relativistic heavy ion collisions incorporating exact conservation of quantum numbers
… are produced in a hadron gas at both thermal and chemical equilibrium. The final state in relativistic ion collision is described by a hadronic gas model which is governed by two freeze out parameters, namely, temperature T and baryon density B/V. It is found that for large interaction volumes …
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Are PCBS in phytoplankton and zooplankton at equilibrium with the water in which they live?
… producers such as phytoplankton simply reflect chemical equilibrium of PCB congeners freely dissolved in the water column and in the lipid fraction of the plankton. In this study, the freely dissolved PCBs in the water of Lake Cochituate, MA, were measured using polyethylene (PE) passive …
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