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Topic: Decomposition reaction

	Inorganic chemistry - Encyclopedia.WorldSearch (Site not responding. Last check: 2007-11-06)
		Inorganic chemistry is the branch of chemistry concerned with the properties and reactions of inorganic compounds.
		This includes all chemical compounds except the many which are based upon chains or rings of carbon atoms, which are termed organic compounds and are studied under the separate heading of organic chemistry.
		There are four categories of inorganic chemical reactions: combination reactions, decomposition reactions, single displacement reactions, and double displacement reactions.
	encyclopedia.worldsearch.com /inorganic_chemistry.htm (296 words)

	Classification of Chemical Reactions
		The reaction of calcium oxide with sulfur dioxide to form calcium sulfite is an example of a combination reaction.
		A single-replacement reaction is a reaction in which an element reacts with a compound and replaces another element in the compound.
		A neutralization reaction is a reaction that occurs between an acid and a base with the formation of an ionic compound and water, if the reaction is in an aqueous solution.
	chemistry.twu.edu /tutorial/TypeChemRxSum.html (731 words)

	Chapter 9: Animations (Site not responding. Last check: 2007-11-06)
		The first reaction shown is a precipitation reaction in which two substances in solution react to form a new substance that is insoluble.
		The second reaction shown is a decomposition reaction in which one substance breaks apart into two or more others.
		The third reaction is an oxidation-reduction reaction in which one substance (often oxygen) is transferred to another substance with an exchange of electrons.
	www.dac.neu.edu /physics/b.maheswaran/phy1121/data/ch09/anim/anim0901.htm (131 words)

	Patent 4059415: Apparatus for reforming combustible into gaseous fuel by reaction with decomposition product of ...
		In a fuel-reforming reaction or partial oxidation reaction, oxygen is used generally in a quantity as small as about 1/4 to 1/3 of the quantity of oxygen necessary to accomplish complete oxidation of the same fuel.
		The inlet 16 of the reaction chamber 10A is formed in the cylindrical wall of the cyclone 10A such that the mixture of the reactants is introduced into the reaction chamber 10A of the cyclone type generally tangentially.
		The decomposition of hydrogen peroxide in the reactor 20 is regulated such that the pressure in the passage 40 at a section upstream of the venturi section 42A is distinctly higher than the pressure in the mixing tube section 44.
	www.freepatentsonline.com /4059415.html (2911 words)

	What is the chemical reaction between baking soda and vinegar? (Site not responding. Last check: 2007-11-06)
		A chemical reaction is defined as a transformation resulting in a change of composition, constitution and/or configuration of a compound.
		The reaction between vinegar and baking soda is an acid/base reaction, followed by a decomposition reaction.
		The second reaction is a release of carbon dioxide in what is known as a decomposition reaction.
	www.webguru.com /vinegar-baking-soda-chemical-reaction.htm (402 words)

	Concepts involved in the lab
		A synthesis reaction is a reaction in which two or more substances combine to produce a single, more complex substance.
		A single replacement reaction is a reaction in which a free element takes the place of a less active element in a compound, setting the less active element free.
		In a double replacement reaction, the anion of one compound and the cation of the other compound react to form a substance that is insoluble in the liquid medium.
	www.sci.brooklyn.cuny.edu /~marciano/labs.htm (326 words)

	[No title]
		The reaction order, activation energy and frequency factor are determined from the relationship between the reaction rate, conversion and temeprature using the log of the kinetic equation and least square multiple linear regression of the data.
		The former determines the reaction mechanism and the latter is established from the Arrhenius equation.
		Otherwise the reaction rate at the beginning is slow and is followed by a rising rate that continues through a maximum sometime during the experiment.
	www.scs.unr.edu /~gotchy/dsc.html (617 words)

	ECSOC5 - The Influence of Solvents and Catalysts on the Thermal Behavior of Azidohetarenes in DSC Measurements - ...
		So we studied the influence of solvents on the reaction or decomposition temperatures of a number of azides (1-7) in order to obtain data which are comparable with the real experimental results of decomposition reactions under synthetic conditions.
		So we studied the influence of solvents on the reaction or decomposition temperatures of a number of azides in order to obtain data which are comparable with the real experimental results of decomposition reactions under synthetic conditions.
		In the literature there are some decomposition reactions described using strong acids such as sulfuric acid or polyphosphoric acid, mainly explained in the formation of nitrenium ions.
	www.mdpi.org /ecsoc-5/a0003/a0003.htm (1536 words)

	Teachers.Net Lesson Exchange: Chemical Reactions (Middle, Science
		Process Objectives: The students wil initially take notes and define a chemical reaction and discuss where the reactants and products are in a reaction.
		Teacher will begin by defining a chemical reaction and discussing the reactants and products in a reaction.After discussing reactions, synthesis and decomposition.
		Show the students or tell of a Snthesis reaction and hve students to copy with the koolaid and water or candy items.
	www.teachers.net /lessons/posts/205.html (234 words)

	Types of Reactions
		A combustion reaction is when all substances in a compound are combined with oxygen, which then produces carbon dioxide and water.
		It is an exothermic reaction, which means heat is produced and is easily distinguished.
		A synthesis reaction is when there is a combination of two or more substances and a compound results.
	library.thinkquest.org /2923/react.html (220 words)

	EXPLOSIVES SCIENCE
		With explosives and propellants, rapid decomposition reactions produce a thrust on the sample pan, causing erroneous mass measurements: the mass appears to increase as reactant decomposes.
		Reaction rate and amount of reactant(s) are the fundamental data required for any kinetics study.
		When mechanisms change during the course of a reaction, it is not valid to "linearize" the rate data for the entire process to obtain a single rate constant.
	home.att.net /~rnrogers (8348 words)

	Title page for ETD etd-51098-125940
		The reaction sequence was found to involve two irreversible, kinetically significant steps: 1) dissociative adsorption of ozone to form a peroxide species and an atomic oxygen species, and 2) desorption of the peroxide intermediate.
		The kinetic behavior of the peroxide species and the overall decomposition reaction were investigated to test the validity of the proposed sequence.
		The oxidation reactivity was found to be closely related to that of ozone decomposition, suggesting an important role of ozone decomposition in the reaction mechanism.
	scholar.lib.vt.edu /theses/available/etd-51098-125940 (477 words)

	Catalysis
		The catalytic force is reflected in the capacity that some substances have, by their mere presence and not by their own reactivity, to awaken activities that are slumbering in molecules at a given temperature.
		This is the hallmark of a catalyst: participation in mechanism steps that simply do not exist without the catalyst, steps that (1) add together to reproduce the original net reaction and (2) make possible a new pathway to achieve the net reaction at often a significantly greater rate.
		Other catalytic cycles are not so benign, such as the catalytic gas-phase reactions that accelerate the destruction of ozone in the stratosphere.
	www.dartmouth.edu /~genchem/0102/spring/6winn/catalysis.html (737 words)

	D4. On the Mechanism of the Thermal Decomposition of Propylene
		The thermal decomposition of propene has been the subject of numerous studies, and the most important features of the reaction seem to be well established.
		Successive addition of two propene molecules to alkyl radicals, 1,5 (and 1,4) H shifts in the adduct radicals, molecular hydrogen eliminations, and decompositions of the oligomeric radicals are parts of the overall mechanism.
		Also, while the present experimental evidence is clearly incompatible with dominant hydrogen formation from the parent molecule in the abstraction reaction, the present data do not allow a clear-cut decision as the role of molecular elimination from the radicals and/or the stable species.
	www.cstl.nist.gov /div838/kinet_conf/agenda/d_session/d4/d4.html (592 words)

	GCSE Notes on Types of Chemical Reaction at Doc Brown's Chemistry Clinic. IGCSE KS4 Expanation and description of how ... (Site not responding. Last check: 2007-11-06)
		However a reversible reaction is a chemical reaction in which the products can be converted back to reactants under suitable conditions and there are quite a few examples of them.
		When a mixture of aluminium and iron(III) oxide is ignited with a magnesium fuse (high activation energy), the the mixture burns furiously with a shower of sparks to leave a red hot blob of iron and a white as of aluminium oxide...
		Double decomposition is chemical reaction that takes place between two compounds, in which the first part of one compound combines with the second part of another compound.
	www.wpbschoolhouse.btinternet.co.uk /page01/ReactionTypes/ReactionTypes.htm (2947 words)

	Decomposition Reactions
		The first reaction we worked with in this lesson was the decomposition of water to form hydrogen and oxygen.
		In this reaction those elements are taken apart from one another.
		Still, this compound is being taken apart and this is a decomposition reaction.
	dl.clackamas.cc.or.us /ch104-04/decompos.htm (143 words)

	UK CRHF Incident Report - Fatal accident, due to decomposition of a diazonium salt
		A lengthy and detailed examination to clarify the cause of the accident has now shown that the explosion was due to the decomposition of an unforeseeable accumulation of 2,4,6 tribromophenyl diazonium bromide.
		The diazotization reaction produces mainly tribromophenyl diazonium hydrogen sulphate, together with tribromophenyl diazonium bromide, which is formed as a by-product with bromide ions derived from the bromination reaction.
		The diazotization reaction has been performed frequently in the past without problems because the diazotization suspension is coupled immediately.
	www.crhf.org.uk /incident12.html (358 words)

	Exercise 7 (Site not responding. Last check: 2007-11-06)
		The result of a combination reaction can be reversed; in other words, a compound can be decomposed into the components from which it was formed.
		This type of reaction is called a decomposition reaction.
		Note, that in this example of chemical decomposition, the oxidation states of the elements involved remain constant.
	library.kcc.hawaii.edu /external/chemistry/decomposition_rxn.html (87 words)

	Thermal Decomposition Reaction and a High Temperature Kinetic Model (Site not responding. Last check: 2007-11-06)
		As a result, we have investigated and developed a high temperature decomposition and oxidation model based on a hierarchical nature of reacting systems to reflect the new development in the small molecule and radical kinetics and thermochemistry and to evaluate recent measurements of DME laminar flame speeds.
		Since the decomposition and abstraction pathways are coupled during both pyrolysis and oxidation, accurate description of the unimolecular decomposition process over a wide range of conditions was needed to properly assess the contributions of the abstraction reactions to fuel destruction.
		In the present work, thermal decomposition of DME was studied theoretically by using the RRKM/master equation approach and the high temperature model was then compared with the literature experimental data.
	ci.confex.com /ci/2005/techprogram/P1893.HTM (343 words)

	Example 7.-- Gas-Phase Calculations (Site not responding. Last check: 2007-11-06)
		The carbon and nitrogen released by organic decomposition are assumed to react to redox and gas-solution equilibrium.
		The organic decomposition reaction with a carbon to nitrogen ratio of approximately 15:1 is added irreversibly to this solution in increments ranging from 1 to 1000 mmol (REACTION keyword).
		After 1 mol of reaction is added, nearly all of the carbon and nitrogen is in the gas phase.
	wwwbrr.cr.usgs.gov /projects/GWC_coupled/phreeqc.v1/html/phqc_58.htm (548 words)

	3.5 Applications : Kinetics of Catalytic Reactions
		It is possible to predict how the kinetics of certain heterogeneously-catalysed reactions might vary with the partial pressures of the reactant gases above the catalyst surface by using the Langmuir isotherm expression for equilibrium surface coverages.
		The decomposition reaction occurs uniformly across the surface sites at which molecule A may be adsorbed and is not restricted to a limited number of special sites.
		Under these circumstances, the molecules of A adsorbed on the surface are in equilibrium with those in the gas phase and we may predict the surface concentration of A from the Langmuir isotherm i.e.
	www.chem.qmw.ac.uk /surfaces/scc/scat3_5.htm (706 words)

	Reaction Types (Site not responding. Last check: 2007-11-06)
		The hallmark of a chemical reaction is that new material or materials are made, along with the disappearance of the mass that changed to make the new.
		There are magnitudes of difference in the amounts of energy in ordinary chemical reactions compared to nuclear reactions, the rearrangement of the nuclei of atoms to change to new elements is enormous compared to the smaller energies of chemical changes.
		Reversible reactions are symbolized in chemical equations by a double-headed arrow, but the standard remains to call the materials on the left the reactants and the materials on the right the products.
	gator.gasd.k12.pa.us /~tlattanzio/reactions.htm (5271 words)

	decomposition \| TutorGig.co.uk Dictionary (Site not responding. Last check: 2007-11-06)
		The act or process of resolving the constituent parts of a compound body or substance into its elementary parts; separation into constituent part; analysis; the decay or dissolution consequent on the removal or alteration of some of the ingredients of a compound; disintegration; as, the decomposition of wood, rocks, etc. [1913 Webster] 2.
		Time of Death, Decomposition and Identification: An Atlas (Cause of De..
		Orthogonal Decompositions and Integral Lattices (De Gruyter Exposition..
	www.tutorgig.co.uk /dict.jsp?keywords=decomposition (199 words)

	micropump (Site not responding. Last check: 2007-11-06)
		Decomposition of hydrogen peroxide by aid of catalyst r esults in the production of oxygen.
		The decomposition of hydrogen peroxide by catalyst is initiated through melting the paraffin by an underlaid microheater.
		An initial triggering of the micropump by input of electric current is sufficient for the continuous actuation through the decomposition reaction.
	www.ttp.net /micropump.htm (141 words)

	Crosslinking Agents Center - Organic Peroxides - Stability and decomposition reaction
		Decomposition can also be caused by hot material being added to an organic peroxide, or by the peroxide being put into a hot recipient.
		Organic peroxides show decomposition reactions, the rate of which depends on temperature and concentration of the product, grade of confinement, type of diluent and kind of molecular structure.
		Because of these fast decomposition reactions, handling, storing and transport conditions of organic peroxides must always be in compliance with the level of the Self Accelerating Decomposition Temperature (SADT).
	www.specialchem4polymers.com /tc/Organic-Peroxides-Crosslinking-Agents/index.aspx?id=3729 (545 words)

	Thermal Decomposition of Glucose (Site not responding. Last check: 2007-11-06)
		The thermal decomposition is investigated by means of thermogravimetric analysis.
		The branched reaction path results in a specific behavior: by changing of the reaction temperature the parts of product C and D are varied.
		At temperature of 210 °C the largest part of B is transformed to the product D. Inversely, at a temperature of 280 °C the largest part is transformed to the product C. This behavior is caused by the large difference of the activation energies for step 2 and step 3, respectively.
	www.micromet.com /advanced/glucose.htm (249 words)

	Solar Production Of Zinc: Concentrated solar energy is used as the source of process heat for the dissociation of zinc ... (Site not responding. Last check: 2007-11-06)
		The direct solar thermal decomposition of ZnO to its elements is an attractive process for the storage of solar energy.
		Fundamental research is on going where we are investigating the reaction kinetics of the ZnO decomposition reaction, the reverse re-oxidation reaction of the products, and radiation heat transfer processes coupled to the reaction kinetics of the decomposition reaction.
		Figure 2 is an example of a reactor concept for the decomposition of ZnO.
	solar.web.psi.ch /daten/projekt/zno/roca/roca.html (777 words)

	Safety: Hot Storage
		This test is designed to determine the lowest temperature at which, under insulated conditions, a substance shows an exothermic reaction.
		The decomposition reaction is excited to the maximum heat generation.
		In case of a sufficiently high temperature increase, which is independent of the total energy of decomposition, there may be a thermal explosion.
	www.kuhner.com /safety/sp_hot.htm (177 words)

	Types of Chemical Reactions (Site not responding. Last check: 2007-11-06)
		All chemical reactions involve a change in substances and a change in energy.
		Chemical reactions in which energy is absorbed are endothermic.
		Chemical reactions in which energy is released are exothermic.
	usoe.k12.ut.us /curr/science/sciber00/8th/matter/sciber/chemtype.htm (525 words)

	441 (Site not responding. Last check: 2007-11-06)
		Dependence of decomposition of polypropylene in supercritical water on engineering parameters such as reaction temperature, reaction time, filling rate of water and amount of polypropylene was studied.
		The results were as follows: (1) Reaction temperature was needed over 430 °C in order to attain the high decomposition.
		Cracking of the hydrocarbons increased with reaction temperature and time to produce the light oil such as gasoline.
	www.csj.jp /journals/nikka/abs/nikka0203/nk03441a.html (187 words)

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