exothermic reactions

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Katie Bart 1I
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exothermic reactions

Postby Katie Bart 1I » Tue Jan 21, 2020 10:53 am

Why does adding heat to an exothermic reaction favor the reactants?

Ryan Narisma 4G
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Re: exothermic reactions

Postby Ryan Narisma 4G » Tue Jan 21, 2020 11:00 am

Hello! When you are given that the reaction is exothermic, then the reaction produces heat. In this case you can think of the addition of heat (whether endothermic or exothermic) as a product or a reactant in the reaction. You would essentially treat heat like you would with concentrations. If heat is a product (meaning that rxn is exothermic), then the addition of heat "raises the concentration of heat as a product" and then the reaction would proceed to produce more reactants. Similarly, if heat is a reactant (meaning that the rxn is endothermic and requires heat to complete the rxn), then the addition of heat "raises the concentration of heat as a reactant" and then the rxn would proceed to produce more products. I hope this helps!

ALegala_2I
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Re: exothermic reactions

Postby ALegala_2I » Tue Jan 21, 2020 11:28 am

Does this mean that cooling an exothermic reaction will favor the products?

Jessica Katzman 4F
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Re: exothermic reactions

Postby Jessica Katzman 4F » Tue Jan 21, 2020 1:15 pm

An exothermic reaction creates heat- therefore if heat is considered a "reactant," the reaction will lean to the product side as it can produce more products with the increase in heat.

BNgo_2L
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Re: exothermic reactions

Postby BNgo_2L » Tue Jan 21, 2020 8:55 pm

ALegala_2I wrote:Does this mean that cooling an exothermic reaction will favor the products?


By "cooling," I assume you mean removing heat, so yes, cooling an exothermic reaction will remove the heat "on the product side" and will therefore favor the products (shift right).

205405339
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Re: exothermic reactions

Postby 205405339 » Tue Jan 21, 2020 10:11 pm

reverse reaction is endothermic thus forming reactants when heat is added

alex_4l
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Re: exothermic reactions

Postby alex_4l » Tue Jan 21, 2020 11:17 pm

An easy way to remember it is
T increase, shift left
T decrease, shift right

205291012
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Re: exothermic reactions

Postby 205291012 » Tue Jan 21, 2020 11:18 pm

An exothermic reaction means heat is given off (similar to it being on the product side). Think of it as increasing products (or heat in this case) would favor reactants.

005321227
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Re: exothermic reactions

Postby 005321227 » Wed Jan 22, 2020 10:05 am

yes, cooling will favor the products!

Keya Jonnalagadda 1A
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Re: exothermic reactions

Postby Keya Jonnalagadda 1A » Wed Jan 22, 2020 12:54 pm

To remember this concept easily, you can think of this in simplified terms: You can think of heat as a reactant in endothermic reactions, and a product in exothermic reactions. Thus, if you increase the temperature (adding heat) to an exothermic reaction, you will favor the reactants, just like with other reactions. Then, if you cool it by removing heat from an exothermic reaction, you will favor the products, just like with other reactions.

Ruth Glauber 1C
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Re: exothermic reactions

Postby Ruth Glauber 1C » Wed Jan 22, 2020 3:11 pm

I use this to remember: if temperature increases, exothermic reactions shift to the left and everything is "the opposite".

Mariah
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Re: exothermic reactions

Postby Mariah » Wed Jan 22, 2020 4:13 pm

ALegala_2I wrote:Does this mean that cooling an exothermic reaction will favor the products?


I think this would be correct. Can someone explain why?

Michelle Xie 2B
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Re: exothermic reactions

Postby Michelle Xie 2B » Thu Jan 23, 2020 4:16 pm

In an exothermic reaction, the heat is written as a product. Increasing a product would push the reaction to the left and favor the reactants.

CameronDis2K
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Re: exothermic reactions

Postby CameronDis2K » Fri Jan 24, 2020 2:08 pm

It is part of LeChatlier's Principle: adding heat to a reaction will favor the other side of the reaction (wherever "heat" is added- reactant or product side). Exothermic reactions have "+heat" on the products side, therefore increasing the heat (or adding more heat) will favor the other side -- the reactants.

Emil Velasco 1H
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Re: exothermic reactions

Postby Emil Velasco 1H » Fri Jan 24, 2020 9:43 pm

Adding heat to an exothermic reaction favors reactants because heat is a product, so thereby increasing the product, it favors the formation of reactants

andrewcj 2C
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Re: exothermic reactions

Postby andrewcj 2C » Sat Jan 25, 2020 1:36 am

Using Le'Chatlier's principle, the system will work to counteract the changes brought upon it. Therefore, heating the reaction favors the reactants, as this uses up the heat. Conversely, cooling the reaction favors the products, as it would release heat, restoring the initial state.

Radha Patel 4I
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Re: exothermic reactions

Postby Radha Patel 4I » Sat Jan 25, 2020 10:58 am

Exothermic reactions release heat when temperature increases, that heat is then favored towards the reactants where the heat is being absorbed. It also increases the product, so the reactants must increase to compensate for the rise in products.

705367472
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Re: exothermic reactions

Postby 705367472 » Sun Jan 26, 2020 9:23 pm

Exothermic reactions release heat causing the pressure to increase.

stephaniekim2K
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Re: exothermic reactions

Postby stephaniekim2K » Sun Jan 26, 2020 10:10 pm

In an exothermic reaction, heat is produced, so there is heat in the products. Adding heat to the reaction would favor the reactants.

Sean Tran 2K
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Re: exothermic reactions

Postby Sean Tran 2K » Sun Jan 26, 2020 10:27 pm

Increasing heat in an exothermic reaction favors the reactants.


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