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endothermic reaction
(redirected from endothermic)

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endothermic reaction

Chemical reaction that requires an input of energy in the form of heat for it to proceed; the energy is absorbed from the surroundings by the reactants. A sign that this is happening is if the container holding the reactants feels cold and the temperature of the reactants falls. The energy absorbed is represented by the symbol +ΔH.

The dissolving of sodium chloride in water and the process of photosynthesis are both endothermic changes. In photosynthesis the energy absorbed is in the form of light energy. In an endothermic reaction the energy needed to break the chemical bonds in the reactants is greater than the energy released when bonds are formed in the products. See energy of reaction.
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Offers AccelMax endothermic chemical blowing agent concentrates including products for PE rotomold parts: BA-RM pellets can be mixed with PE powder to foam the core of a multilayer product, while BA-RMP powder can be mixed with powdered PE to foam monolayer walls.
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no more crosslinking takes place, then instead of exothermic, sometimes we get endothermic behavior, depending on the nature of polymer and its tendency to reversion.
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Finally, the net reaction may be exothermic or (more commonly) endothermic, depending on reaction stoichiometry (Simpson et al.
Investigations of burial diagenesis in carbonate hydrocarbon ... by Machel, Hans G. / Geoscience Canada
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