Exothermic Reaction


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Exothermic Reaction

 

a chemical reaction in which heat is given off. Examples of exothermic reactions are combustion, neutralization, and most of the reactions involving the formation of chemical compounds from elements. The amount of heat liberated during an exothermic reaction depends on the type of reaction, the mass and nature of the reagents, the phase of the products and reactants, and the specific conditions under which the reaction occurs (for instance, temperature and pressure). The heat of reaction of an exothermic reaction is equal in absolute value but opposite in sign to that of the corresponding endothermic reaction.

References in periodicals archive ?
An exothermic reaction ensues with darkening of mixture and completed almost immediately as confirmed by TLC.
The product of the Prater number, which is positive for exothermic reactions, and the intrapellet Damkohler number essentially represents a ratio of the rate of thermal energy generation due to chemical reaction relative to the rate of thermal conduction (i.
The torrential rain caused some water to seep into a perforated drum which caused an exothermic reaction,' said Bill Gough, of West Midlands Fire Service.
Binder material is removed via evaporation and exothermic reaction, rather than with potentially hazardous solvents.
During curing the exothermic reaction may raise the temperature by about 80 [degrees]C, depending upon the amount of hardener used.
And unlike methyl methacrylate, hydroxyapatite cement causes no exothermic reaction during the setting phase.
HotHands packets contain a mixture of powdered iron, salt water, activated charcoal and vermiculite, which cause a heat-producing exothermic reaction when exposed to air.
The resulting exothermic reaction consistently generates temperatures in excess of 155 degrees, thereby destroying pathogens.
Localized heating and rapid quenching of this highly exothermic reaction prevents damage to the catalyst surface which, in conventional regeneration processes, is usually caused by prolonged exposure to high temperatures.
The reaction of the sugars' carmelization generates its own heat in the form of an exothermic reaction.
The alkalinity of cement is due to the exothermic reaction of calcium oxide with water, which forms calcium hydroxide.