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Abigail Urbina 1K
Posts: 102
Joined: Thu Jul 27, 2017 3:01 am


Postby Abigail Urbina 1K » Thu Feb 08, 2018 6:55 pm

In part c of 33, the chemical reaction is SO2(g) + Br2(g) +2H2O(l) --> H2SO4(aq) + 2HBr(aq)

Entropy decreases in this reaction. The solution manual says that entropy decreases because the total number of moles decreases. However, like in previous problems, is it sufficient to say that entropy decreases because the moles of gas is less on the product side of the reaction?

David Minasyan 1C
Posts: 54
Joined: Thu Jul 13, 2017 3:00 am

Re: 9.33

Postby David Minasyan 1C » Thu Feb 08, 2018 7:59 pm

I think that it would - at least that's what I did when I was doing this problem. Gas to liquid means less movement of molecules so that explanation should suffice.

Jason Liu 1C
Posts: 52
Joined: Fri Sep 29, 2017 7:04 am

Re: 9.33

Postby Jason Liu 1C » Thu Feb 08, 2018 8:13 pm

I agree. Gas has a much greater entropy than liquid, so just the fact that there is no gas on the product side should be enough to show that entropy has decreased.

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