Textbook Problem 5.35

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Ellen Amico 2L
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Joined: Thu Sep 19, 2019 12:16 am

Textbook Problem 5.35

Postby Ellen Amico 2L » Fri Jan 24, 2020 12:23 pm

5.35 says: The following plot shows how the partial pressures of reac- tant and products vary with time for the decomposition of com- pound A into compounds B and C. All three compounds are gases. Use this plot to do the following: (a) Write a balanced chemical equation for the reaction. (b) Calculate the equilibrium constant for the reaction.

I'm confused on how to read the graph in order to write the reaction. How do I do this?

Emma Popescu 1L
Posts: 105
Joined: Wed Sep 11, 2019 12:16 am

Re: Textbook Problem 5.35

Postby Emma Popescu 1L » Fri Jan 24, 2020 2:06 pm

You have to look at the ratio of change for each reactant/product. Since the change is double for C (10) and A (-10) compared to B (5), that means that the reaction is 2A -> B + 2C.

Sanjana Munagala_1j
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Joined: Sat Aug 24, 2019 12:17 am
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Re: Textbook Problem 5.35

Postby Sanjana Munagala_1j » Fri Jan 24, 2020 8:08 pm

You could also use an ICE table for this problem:
A B C
I 27.5 0 0
C -2(5) +5 +2(5)
E 17.5 5 10

Where 5 is equal to "x"
Therefore the reaction would be:
2A --> B + 2C

Hope that helps!


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