HELP with DAT GENIUS GC Exam 1

[I Brush My Teeth]

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Just took the DATgenius GC exam 1 and scored a 21.

I had trouble with the question posted below about Entropy change, I was wondering if someone could help me out: I thought that a change from gas to solids and liquids would be a huge entropy change... why is entropy change only related to gas?

Also, how realistic is this score/how does DAT genius stack up to the real deal?

 

[510586]

Just took the DATgenius GC exam 1 and scored a 21.

I had trouble with the question posted below about Entropy change, I was wondering if someone could help me out: I thought that a change from gas to solids and liquids would be a huge entropy change... why is entropy change only related to gas?

Also, how realistic is this score/how does DAT genius stack up to the real deal?

I heard the next two are a lot harder. Also it is a huge entropy change but a huge decrease NOT increase

 

[grivacobae]

answer c is first because it goes from 3 moles of gas to 4 moles of gas (most positive entropy change)
answer b is middle because 3 moles to 2 moles, which is negative entropy but there is still gas in the products
answer a is last because it starts with 2 moles of gas then to no moles of gas

thats how i see it, btw nice score, let me know how you do on 2nd chem test!