Increasing/Decreasing temp

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Gisela F Ramirez 2H
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Joined: Fri Sep 28, 2018 12:27 am

Increasing/Decreasing temp

Postby Gisela F Ramirez 2H » Wed Feb 13, 2019 12:06 am

How does increasing or decreasing the temperature of a reaction affect it?

Luc Lorain 1L
Posts: 59
Joined: Fri Sep 28, 2018 12:18 am

Re: Increasing/Decreasing temp

Postby Luc Lorain 1L » Wed Feb 13, 2019 1:30 am

The effect of temperature on a given equilibrium will depend on whether the reaction is endothermic or exothermic.

Within a reaction, think of heat like a reactant if the equation is endothermic (H > 0), and as a product if exothermic (H < 0). Though heat is not a discrete substance, putting it in these terms will make applying Le Châtelier's principle much easier.

If the a reaction is endothermic, removing heat (decreasing temperature) will be the equivalent of removing react, and will favor reactant formation; the system will likewise favor products if temperature is increased (adding more heat). If exothermic, decreasing temperature will be the equivalent of removing product, and will favor product formation; the system will likewise favor reactants if temperature is increased.

Tony Chung 2I
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Joined: Fri Sep 28, 2018 12:19 am

Re: Increasing/Decreasing temp

Postby Tony Chung 2I » Mon Feb 25, 2019 2:47 pm

It can change which way the reaction proceeds.

klarratt2
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

Re: Increasing/Decreasing temp

Postby klarratt2 » Mon Feb 25, 2019 3:14 pm

The effect of temperature on a reaction depends on whether the reaction is endothermic or exothermic. If the reaction is endothermic, adding heat to it will favor the forward reaction and taking heat out of it will favor the reverse reaction. If the reaction is exothermic, adding heat to it will favor the reverse reaction and taking heat out of it will favor the reverse reaction.

Sapna Ramappa 1J
Posts: 63
Joined: Fri Sep 28, 2018 12:24 am

Re: Increasing/Decreasing temp

Postby Sapna Ramappa 1J » Sat Mar 09, 2019 8:33 am

I always think about it in regards to endothermic reactions. Increasing temperature will always favor endothermic reaction, and thus decreasing temperature will favor the exothermic reaction. Make sure you pay attention to the delta H, and then you can figure out the effect of a temperature change.

Pritish Patil 1K
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

Re: Increasing/Decreasing temp

Postby Pritish Patil 1K » Tue Mar 12, 2019 1:08 pm

If a reaction is endothermic, then increasing the temperature will shift the reaction to the right and decreasing the temperature will shift the reaction to the left. If a reaction is exothermic, then decreasing the temperature will shift the reaction to the right and increasing the temperature will shift the reaction to the left.

Destiny Diaz 4D
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Joined: Fri Sep 28, 2018 12:28 am

Re: Increasing/Decreasing temp

Postby Destiny Diaz 4D » Sat Mar 16, 2019 4:03 pm

depending on if the reaction is endo or exothermic, it will change the way the reaction proceeds and which direction is most favorable.

CristinaMorales1F
Posts: 31
Joined: Fri Feb 16, 2018 3:01 am

Re: Increasing/Decreasing temp

Postby CristinaMorales1F » Sat Mar 16, 2019 7:36 pm

how does increasing the volume and decreasing the pressure of a reaction affect which way the reaction will flow?

CristinaMorales1F
Posts: 31
Joined: Fri Feb 16, 2018 3:01 am

Re: Increasing/Decreasing temp

Postby CristinaMorales1F » Sat Mar 16, 2019 7:39 pm

Also, how are we able to determine which way the reaction will flow if the reaction is endothermic vs exothermic?


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