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Topic: Chemical kinetics


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In the News (Thu 31 May 12)

  
  Chemical Kinetics   (Site not responding. Last check: 2007-10-26)
The stopped-flow technique and its use in studying chemical reactions is described.
The stoichiometric coefficients for a chemical equation are determined by comparing the slopes of concentration-time plots for the reactants and products.
The rate law and the rate constant are determined for a reaction by preparing characteristic kinetics plots from concentration-time data.
www.chm.davidson.edu /ChemistryApplets/kinetics   (330 words)

  
  Fifth International Conference on Chemical Kinetics
NIST is hosting the 6th International Conference on Chemical Kinetics (25-29 July 2005).
This conference series, inaugurated in 1978, brings together scientists from diverse disciplines to discuss matters of common interest in gaseous, condensed, and heterogeneous chemical kinetics.
Chemical kinetics is a fundamental tool for the understanding and control of complex chemical processes, both directly by providing rate data on the elementary reactions involved, and indirectly by an improved understanding of the reactivity patterns and the thermodynamics of reactive intermediates.
www.cstl.nist.gov /div838/kinetics2001   (261 words)

  
  Chemical kinetics - Wikipedia, the free encyclopedia
In 1864, Peter Waage pioneered the development of chemical kinetics by formulating the law of mass action which states that the speed of a chemical reaction is proportional to the quantity of the reacting substances.
Kinetics deal with the experimental determination of reaction rates from which a rate law and reaction rate constant are derived.
The kinetic isotope effect is a difference in the rate of a chemical reaction when an atom in one of the reactants is replaced by one of its isotopes.
en.wikipedia.org /wiki/Chemical_kinetics   (1184 words)

  
 CMS—Chemical Kinetics of Hydrocarbon Ignition   (Site not responding. Last check: 2007-10-26)
HCCI combustion is dominated by chemical kinetics of ignition.
Chemically reactive systems and chemical kinetics are important in many Livermore programs, including the high explosives in nuclear weapons, toxics, and chemical warfare agents in chemical warfare systems.
While we have previously developed kinetic models for natural gas and alcohol fuels such as methanol and ethanol, both gasoline and diesel fuels are enormously complex mixtures of hundreds or even thousands of distinct chemical components.
www-cms.llnl.gov /s-t/hydro_ignition.html   (1005 words)

  
 kinetics.htm   (Site not responding. Last check: 2007-10-26)
The energy source comes from the kinetic energy of the compound due to the velocity at which it is zipping around.
The higher the temperature, the faster the molecules are moving around, the greater the kinetic energy.
This energy, as a function of kinetic energy and temperature is called the energy of activation.
www.towson.edu /~ladon/kinetics.html   (1109 words)

  
 CHP - Kinetics Intro
Definition: Chemical kinetics is the study of the rate at which chemical reactions occur.
The rate of a chemical reaction, or simply the reaction rate, is the change in concentration of the reactants or products as a function of time.
To study the kinetics of this reaction prepare a series of mixtures of CO and NO and measure the reaction rate immediately after mixing the reactants.
www.chem.vt.edu /chem-ed/general/kinetics.html   (506 words)

  
 Amazon.com: Chemical Kinetics & Catalysis: Books: Richard I. Masel   (Site not responding. Last check: 2007-10-26)
Chemical Kinetics and Catalysis is a comprehensive guide to chemical kinetics and catalysis, and focuses on the use of computational tools for studying chemical kinetics and catalytic phenomena.  Provides a thorough and up-to-date treatment of chemical kinetics and catalysis, combining traditional background information with the latest computational methods for fitting data to appropriate rate equations.
Contains chapters reviewing of kinetic concepts, introducing kinetics via rate equations and mechanisms, explaining the theory of reaction rates (a section on trajectory calculations to simulate reactions), predicting potential energy surfaces (methods for directing the reaction rate), and discussing catalysis with a focus on modifying the reaction rate.
Chemical kinetics is the study of reaction rates.
www.amazon.com /exec/obidos/tg/detail/-/0471241970?v=glance   (970 words)

  
 JCE 2002 (79) 313 [Mar] Chemical Kinetics and Catalysis (by Richard I. Masel)
The author, who has written a previous book on reactions on solid surfaces, is a researcher in and acknowledged expert on chemical kinetics and catalysis and teaches courses on these subjects at the University of Illinois.
Some of the chemical structures are poorly or inaccurately drawn and there are enough errors of all sorts to be irritating.
The book may also serve as a reference for those whose interest in chemical kinetics and catalysis is peripheral to their primary teaching and research functions.
jchemed.chem.wisc.edu /Journal/Issues/2002/Mar/abs313.html   (698 words)

  
 chemical kinetics - HighBeam Encyclopedia   (Site not responding. Last check: 2007-10-26)
The glass transition temperature (Tg) as an index of chemical conversion for a high-Tg amine/epoxy system: chemical and diffusion controlled reaction kinetics.
Chemical reaction kinetics of sulfur dioxide and oxygen with unsaturated drying oils.
Comparative study of the cure kinetics of an unsaturated polyester resin using different procedures.
www.encyclopedia.com /html/X/X-chem-kin.asp   (256 words)

  
 CHEMICAL KINETICS-RATE OF A CHEMICAL REACTION-VELOCITY OF REACTION-RATE CONSTANT-CHARACTERISTICS OF RATE CONSTANT-ORDER ...
The branch of chemistry, which deals with the "RATE" and the SPEED at which a chemical reaction occurs, is called "CHEMICAL KINETICS".
The study of chemical kinetics, therefore, includes the rate of a chemical reaction and also the factors that influence or alter or control the rate of chemical reactions.
It should be noted down that all the molecules shown in a chemical equation do not determine the value of order of reaction but only those molecules whose concentrations are changed are included in the determination the order of a reaction.
www.citycollegiate.com /chemical_kineticsXIa.htm   (421 words)

  
 Chemical Kinetics   (Site not responding. Last check: 2007-10-26)
Chemical kinetics is the study of the rate of a reaction, that is how fast or how slow the reaction occurs.
The rate of a chemical reaction depends on what kinds of bonds are being formed and broken.
In many cases the rate of a chemical reaction in a homogeneous system is approximately doubled by an increase in temperature of 10 degrees Celsius.
hobbes.lite.msu.edu /~szegedi/ChemicalKinetics.html   (696 words)

  
 Chemical Kinetics
Chemical kinetics is the study and discussion of chemical reactions with respect to reaction rates, effect of various variables, re-arrangement of atoms, formation of intermediates etc.
The study of energy gained or released in chemical reactions is called thermodynamics, and such energy data are called thermodynamic data.
What is the discipline that studies chemical reactions with respect to reaction rates, effect of various variables, re-arrangement of atoms, formation of intermediates etc.
www.science.uwaterloo.ca /~cchieh/cact/c123/chmkntcs.html   (857 words)

  
 :: MIT ChE :: Research - Catalysis and Chemical Reaction Engineering
From understanding the kinetics of the reaction, and the equilibrium extent to which it can proceed, come applications: the network of reactions during combustion, the chain reactions that form polymers, the multiple steps in the synthesis of a complex pharmaceutical molecule, the specialized reactions of proteins and metabolism.
Chemical kinetics is the chemical engineer's tool for understanding chemical change.
In designing a reactor, the chemical engineer must consider how the chemical kinetics, often modified by catalysis, interacts with the transport phenomena in flowing materials.
web.mit.edu /cheme/research/catalysis.html   (346 words)

  
 Chemical Kinetics   (Site not responding. Last check: 2007-10-26)
Chemical kinetics is the study of rates of chemical reactions.
The goal of chemical kinetics is to understand the factors that control the rates of chemical reactions.
Another reason for studying kinetics is that by understanding the factors that control reaction rates, we may be able to improve chemical syntheses by accelerating desirable reactions while minimizing the effects of undesirable reactions.
www.accd.edu /pac/chemistr/lectures/chemical_kinetics.htm   (12263 words)

  
 CHEMICAL KINETICS
Observe that use of the stoichiometric coefficient insures that the rate of a chemical reaction is the same regardless of which chemical species is used in the definition.
The rate law is an expression for the reaction rate in terms of concentrations of chemical species involved in the reaction.
Use kinetic data to characterize the energy and composition of the "transition state" in a chemical reaction.
www.chem.hope.edu /~polik/Chem345-1998/bromination/ChemicalKinetics1.html   (1138 words)

  
 CHEMICAL KINETICS DIVISION
Chemical reactions in organic molecular-organized systems; the kinetics and mechanism of processes of atoms and small clusters of metals with different organic and inorganic ligands.
The theoretical and experimental peculiarities of the chemical transformations at low (200-77 K) temperatures, place and role of cryochemistry in the development of science and techniques are considered.
The basic purpose is to give the students the foundations of the formal chemical kinetics, to supply them with practical skills in treatment of experimental data for simple and complex chemical reactions, including chain reactions.
www.chem.msu.su /eng/chair/kinet.html   (534 words)

  
 Chemical Kinetics
Conversion of "chemical A" (diethylsuccinate) to "chemical B" (ethylmethylsuccinate) to "chemical C" (dimethylsuccinate), as a function of time.
(a is the rate constant for the conversion of chemical A to chemical B, and b is the rate constant for the conversion of chemical B to chemical C.) Note than only two parameters (a and b) control the shape of all three equations!
To obtain initial estimates for the parameters: (1) Note that the concentration of chemical A depends only on a, with the concentration falling by a factor of e (2.7) when a x = 1.
www.csc.calpoly.edu /~rtross/csc111/C1ChemicalKineticsData.htm   (274 words)

  
 CBE 430: Chemical Kinetics and Reactor Design
This course integrates the concepts of chemical kinetics with those of conservation of energy and mass to form a basis for designing common types of reactors (both batch and continuous flow) for operation under both isothermal and nonisothermal conditions.
Safety considerations are presented via discussions of the kinetic aspects of chain branching and thermal explosions.
While developing the skills required to solve problems associated with the heart of chemical processes, namely transformation of feedstocks from one chemical form to another, the course also establishes a basis for a pattern of lifelong learning that fosters integration of concepts from several aspects of science and engineering.
www.engr.wisc.edu /che/courses/che430.html   (526 words)

  
 Separable differentiable equations and chemical kinetics
Separable differential equations often appear in chemical kinetics, which is the study of rates of chemical reactions.
Determining rates of chemical reactions is a crucial first step in the design of any commercial chemical process, so this is an area of particular interest to chemists and chemical engineers.
Chemicals Y and Z combine to form X at a rate that is proportional to the product of the concentrations of Y and Z.
www.math.wpi.edu /Course_Materials/Calc3/Labs/node2.html   (785 words)

  
 The Second Law of Thermodynamics (10)
Further, you know now that all the chemical catastrophes that hit us are similarly caused because the substances involved in the disaster obey the second law.
Philosophers and novelists and their readers have been disserved by hearing statements of the second law (that events and physical matter move in the direction of energy dispersion) without the essential codicil from chemistry that the law is continually blocked by activation energies.
Chemical kinetics (chemical dynamics) is the area of chemistry that focuses on activation energies and the rates of chemical reactions.
www.secondlaw.com /ten.html   (1199 words)

  
 Ph.D. Course: Chemical Kinetics
The basic goal of the course is to introduce the concepts and issues associated with irreversible processes and the techniques embodied in specific programs available to the chemical physics community for predicting the course and rates of chemical reactions.
In the first of a two-part course we will be exclusively focused on presenting the necessary concepts for understanding and using the GAUSSIAN and POLYRATE computer programs to calculate reaction paths and the associated rate constants for real molecular systems.
The second part will be devoted to special topics in the area of chemical kinetics geared to the interests of the class.
www.kvac.uu.se /utbildning/kinetics2004.html   (274 words)

  
 Amazon.com: Chemical Kinetics and Reaction Dynamics: Books: Paul L. Houston   (Site not responding. Last check: 2007-10-26)
Chemical Kinetics and Reaction Dynamics is a modern textbook for advanced courses.
Chemical kinetics and reaction dynamics are not easy subjects, demanding quite a lot of physics in some complicated settings.
From the first chapter on the kinetic theory of gases, Houston's focus on the physics - on keeping derivations short and clear, on connecting formulae with sound physical intuition - is striking.
www.amazon.com /exec/obidos/tg/detail/-/0072435372?v=glance   (920 words)

  
 IBM Research | Almaden Research Center | Science and Technology | Computational Science | Chemical Kinetics | Chemical ...   (Site not responding. Last check: 2007-10-26)
The chemical kinetics simulation project, originated at IBM's Almaden Research Center in San Jose, California, is a multi-faceted effort aimed at understanding, predicting and controlling chemical reactions used in processing of inorganic and polymeric thin films.
It is a scientific software tool developed by chemists in the kinetics simulation project that provides the bench scientist with an easy-to-use, rapid, interactive method for the accurate simulation of chemical reactions.
Realistic, reliable chemical models allow scientists and engineers to minimize the amount of physical experimentation used for a study, and avoid unnecessary generation of hazardous waste - CKS is particularly useful for this purpose.
www.almaden.ibm.com /st/computational_science/ck/msim   (270 words)

  
 CHEMKED - Chemical Kinetics - Gas Phase Chemical Reactions - Thermodynamics - Databases – Simulation – Analysis
The CHEMKED program (free download is here) is a set of highly effective, easy-to-use tools for creating and editing thermodynamic and reaction databases, forming reaction mechanisms and solving problems of complex gas-phase chemistry.
The program will be useful for you, if you work in the field of the chemical kinetics and study the atmospheric chemistry, air pollution, combustion chemistry or waste gas treatment.
You will have the checked and consistent thermodynamic and chemical kinetics databases with easy access to the information.
mark.jelezniak.de /chemked   (249 words)

  
 Chemical Kinetics - Elsevier
Chemical Kinetics bridges the gap between beginner and specialist with a path that leads the reader from the phenomenological approach to the rates of chemical reactions to the state-of-the-art calculation of the rate constants of the most prevalent reactions: atom transfers, catalysis, proton transfers, substitution reactions, energy transfers and electron transfers.
Chemical Kinetics goes far beyond the qualitative description: with the guidance of theory, the path becomes a reaction path that can actually be inspected and calculated.
A great emphasis in the clarity of the concepts is achieved by illustrating all the theories and mechanisms with recent examples, some of them described with sufficient detail and simplicity to be used in general chemistry and lab courses.
www.elsevier.com /wps/product/cws_home/708843   (518 words)

  
 Chemical Kinetics
Chemical kinetics is the study of chemical (or biological) systems whose composition changes with time.
In biological systems, for example, the cellular machinery involves a very large number of chemical reactions catalyzed by proteins, association (and dissociation) of proteins with other proteins and with DNA molecules, and conformational changes in the stucture of the biological molecules.
Each of these processes can be described at some level as a simple chemical reaction between 2 or more states of the system.
www.uic.edu /classes/phys/phys461/phys450/ANJUM06   (1458 words)

  
 SRI: PSD's Chemical Kinetics
The rates of chemical reaction and how these rates vary with temperature and pressure are the fundamental building blocks of models of chemically reacting processes.
The selection of reaction rates for a complex chemical mechanism must self-consistently determine the chemical kinetics parameters and the mechanism must be validated against laboratory measurements.
In current projects, we are developing chemical mechanisms for specific plasma processes for silicon devices, measuring reaction rates crucial to the chemical composition of the upper atmosphere, and producing NO x
www.sri.com /psd/research/kinetics.html   (224 words)

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