Spontaneous reverse reaction?  [ENDORSED]

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Chloe Thorpe 1J
Posts: 77
Joined: Fri Sep 28, 2018 12:16 am

Spontaneous reverse reaction?

Postby Chloe Thorpe 1J » Thu Jan 10, 2019 2:59 pm

In the 7th edition textbook on page 416, it says "If Q>K, the reverse reaction is spontaneous...". What does it mean by spontaneous?

Sean Reyes 1J
Posts: 67
Joined: Fri Sep 28, 2018 12:24 am

Re: Spontaneous reverse reaction?

Postby Sean Reyes 1J » Thu Jan 10, 2019 3:00 pm

Saying that the reverse reaction is spontaneous just means that the reverse reaction will occur and products will decompose to form reactants.
Hope this helps!

Chloe Thorpe 1J
Posts: 77
Joined: Fri Sep 28, 2018 12:16 am

Re: Spontaneous reverse reaction?

Postby Chloe Thorpe 1J » Thu Jan 10, 2019 5:01 pm

So it only means that the reverse reaction will occur?

Matthew Tran 1H
Posts: 165
Joined: Fri Sep 28, 2018 12:16 am

Re: Spontaneous reverse reaction?  [ENDORSED]

Postby Matthew Tran 1H » Thu Jan 10, 2019 7:13 pm

If a reaction is spontaneous, it just means that the reaction is thermodynamically favored. I'm sure we'll learn about this in the future when we cover thermodynamics. It would be incorrect to say that only the reverse reaction is occurring because reactions are dynamic: the forward and reverse reactions are both occurring. The key here is though, that when Q>K, the rate of the reverse reaction is greater than that of the forward reaction (the reverse reaction is dominant), thus there is a net reaction in the reverse direction.

Lisa Werner 2F
Posts: 72
Joined: Fri Sep 28, 2018 12:17 am

Re: Spontaneous reverse reaction?

Postby Lisa Werner 2F » Thu Jan 10, 2019 8:58 pm

It means that the reverse reaction is thermodynamically favored, so it is happening at a greater rate than the forward reaction.


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