Homework 7E1

Arrhenius Equation:

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Jasmine 2C
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Joined: Wed Sep 18, 2019 12:18 am

Homework 7E1

Postby Jasmine 2C » Thu Mar 12, 2020 10:16 pm

How does a catalyst affect (a) the rate of the reverse reaction; (b) the value of ∆Hr° for the reaction?

Can someone explain the answer for part B?

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Re: Homework 7E1

Postby Diana_Diep2I » Thu Mar 12, 2020 10:25 pm

It also speeds up the rate of the reverse reaction and because a catalyst only affects speed, it does not affect enthalpy.

Delaney Smith 1C
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Re: Homework 7E1

Postby Delaney Smith 1C » Fri Mar 13, 2020 7:34 am

A catalyst doesn't affect deltaH! Remember to not mix thermodynamics with kinetics. All catalysts do is lower the activation energy of the reaction which therefore increases the rate of the reaction, but not the enthalpy of the reaction!

Cooper Baddley 1F
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Re: Homework 7E1

Postby Cooper Baddley 1F » Fri Mar 13, 2020 9:17 am

Just because the speed of the reaction is different doesn't mean the reaction itself is. It will still have the same enthalpy value.

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Re: Homework 7E1

Postby ShravanPatel2B » Fri Mar 13, 2020 9:24 am

A catalyst would speed up the rates of the reverse and forward reactions in part a. But however Catalysts have no effect on the delta H of a reaction because it does not affect thermodynamics.

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