Endothermic Reaction


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Endothermic Reaction

 

a chemical reaction that is accompanied by the absorption of heat. Endothermic reactions include dissociation (in particular, the division of molecules into free atoms), photosynthesis in plants, the formation of certain compounds from simple substances, and the process of producing metals from ores by reduction reactions. Endothermic reactions are the reverse of exothermic reactions, during which heat is released.

References in periodicals archive ?
Two peaks corresponding to endothermic reactions are observed in the DTA curve.
Increasing pressure during the gelatinization process causes an increase in the peak temperature, or the temperature at which the endothermic reaction occurs at a maximum.
during endothermic reactions the gas in the reactor is run in one direction for ca 2 hours and then during exothermic reactions the gas is run in the opposite direction for another 2 hours etc.
This result is expectablebecause the dehydration of tincalconite is an endothermic reaction.
However, CDRM is strong endothermic reaction with high energy consumption, and catalysts are easy to deactivate due to carbon deposition.
Since the Tg signifies the transition of the polymer from a glassy solid to an elastic phase, the transition involves a drop in enthalpy and shows up in the DSC curve as an endothermic reaction.
It was concluded that the flame resistance mechanism of LCPs can be attributed to the endothermic reaction at the ester linkage rupture process, char formation and diluting oxygen by evolution of C[O.
For the sample with much more surface group, the heat of endothermic reaction was greater.
Furthermore, isocyanate can react with itself at high temperatures in an endothermic reaction that produces carbodiimide and carbon dioxide.
Flame retardancy is further aided by the endothermic reaction of nitrogenous gas sublimation, resulting in lower combustion temperatures.
Flame retardancy is also aided by the endothermic reaction of nitrogenous gas sublimation, resulting in lower combustion temperatures, Akzo says.