Hi, could someone explain the difference between endothermic and exothermic reactions and give an example of each?
Thanks!
(Claire Woolson Dis. 3J)
Endothermic v. Exothermic Reactions
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Re: Endothermic v. Exothermic Reactions
In endothermic reactions, heat is consumed or absorbed to move the reaction forward. In exothermic reactions, heat is released or given off. You can think of endothermic reactions as having heat as a reactant, whereas exothermic reactions have heat as a product.
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Re: Endothermic v. Exothermic Reactions
Reactions that include bond breaking are generally endothermic. EX: Cl2 <--> 2Cl. Combustion reactions are almost always exothermic.
Re: Endothermic v. Exothermic Reactions
In my discussion section, the delta H for a reaction was -100.2 KJ/mol. My TA said that the negative sign means the reaction is exothermic (heat's produced) so the reaction shifts to the right. However, don't exothermic favor the formation of reactants? Could somebody please clarify this for me?
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Re: Endothermic v. Exothermic Reactions
In endothermic energy is being consumed, in other words it requires energy in order to function. In an exothermic reaction energy is being released. Often times, exothermic reactions are used to power endothermic reactions.
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Re: Endothermic v. Exothermic Reactions
Endothermic: requires heat to carry forward the reaction and therefore deltaH is on the left. Increasing heat in this case would produce more products.
Exothermic: releases heat once reaction has occurred and therefore deltaH is on the right. Increasing heat causes equilibrium to favor reactants and shift left.
Exothermic: releases heat once reaction has occurred and therefore deltaH is on the right. Increasing heat causes equilibrium to favor reactants and shift left.
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Re: Endothermic v. Exothermic Reactions
Everyone is explaining what Endothermic and Exothermic are but here are some examples you can look up if you wanna learn more or see:
Endothermic:
dissolving ammonium chloride in water
mixing water and ammonium nitrate
Exothermic:
any combustion reaction
a neutralization reaction
Endothermic:
dissolving ammonium chloride in water
mixing water and ammonium nitrate
Exothermic:
any combustion reaction
a neutralization reaction
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Re: Endothermic v. Exothermic Reactions
In an endothermic reaction the system absorbs energy(delta H>0), where as in exothermic reactions heat is released(delta H<0).
If you click on this link http://antoine.frostburg.edu/chem/senes ... ples.shtml , it will take you several examples of each type of reaction.
If you click on this link http://antoine.frostburg.edu/chem/senes ... ples.shtml , it will take you several examples of each type of reaction.
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Re: Endothermic v. Exothermic Reactions
How does an endothermic or exothermic reaction affect the direction of the reaction?
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Re: Endothermic v. Exothermic Reactions
In an endothermic reaction, heat is absorbed and can therefore be thought of as basically a reactant. Therefore increasing the temp would cause the reaction to favor the products. Decreasing the temp would cause the rxn to favor the reactants.
For exothermic reactions, heat is released. Therefore heat is technically a product of the reaction. Therefore an increase in temp would favor reactants. A decrease in temp would favor products. :)))
For exothermic reactions, heat is released. Therefore heat is technically a product of the reaction. Therefore an increase in temp would favor reactants. A decrease in temp would favor products. :)))
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