Catalysts

Arrhenius Equation:

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Giselle Littleton 1F
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Joined: Wed Sep 18, 2019 12:20 am

Catalysts

Postby Giselle Littleton 1F » Sun Mar 08, 2020 9:56 pm

How do catalysts lower the activation energy of the transition state?

Hui Qiao Wu 1I
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Joined: Fri Aug 30, 2019 12:16 am

Re: Catalysts

Postby Hui Qiao Wu 1I » Sun Mar 08, 2020 10:05 pm

They somehow affect the orientation of the substrate it binds to, helping it to achieve the proper orientation.

PranaviKolla2B
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Joined: Fri Aug 30, 2019 12:17 am

Re: Catalysts

Postby PranaviKolla2B » Sun Mar 08, 2020 10:07 pm

What else are the functions of catalysts, besides lowering the activation energy?

ABombino_2J
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Joined: Thu Jul 11, 2019 12:15 am

Re: Catalysts

Postby ABombino_2J » Sun Mar 08, 2020 10:10 pm

Lowering the activation energy and increasing the rate are the main functions of a catalyst. It’s important to note they go into the reaction and come out; in other words, they are not consumed.

Cole Woulbroun 1J
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Joined: Thu Jul 25, 2019 12:16 am

Re: Catalysts

Postby Cole Woulbroun 1J » Sun Mar 08, 2020 10:16 pm

I am not exactly sure about a non-enzymatic catalyst's mechanism of lowering activation energy, but the principles of the two types of catalysts performing the process is likely similar. In an enzyme, the various chemical groups on the amino acids that are exposed to the substrate form non-covalent interactions with them. The formation of these temporary bonds releases energy, effectively lowering the energy of the transition state and allowing for the reaction to occur.

Cole Woulbroun 1J
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Joined: Thu Jul 25, 2019 12:16 am

Re: Catalysts

Postby Cole Woulbroun 1J » Sun Mar 08, 2020 10:18 pm

Proper orientation also helps increase the reaction rate.

Nare Nazaryan 1F
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Joined: Fri Aug 09, 2019 12:17 am

Re: Catalysts

Postby Nare Nazaryan 1F » Sun Mar 08, 2020 10:44 pm

PranaviKolla2B wrote:What else are the functions of catalysts, besides lowering the activation energy?

They speed up a reaction by reducing the activation energy or changing the reaction mechanism.

305385703
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

Re: Catalysts

Postby 305385703 » Mon Mar 09, 2020 11:22 am

catalysts provide a different way from going to reactants to products. this way allows for the breaking and forming of bonds to require less energy, because the orientation of the reactants, intermediates and products are different than if the reaction proceeded normally.

Elizabeth Harty 1A
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Joined: Sat Jul 20, 2019 12:16 am

Re: Catalysts

Postby Elizabeth Harty 1A » Mon Mar 09, 2020 11:23 am

providing a alternate pathway and weakening bonds


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