## ST 4A.1A [ENDORSED]

gabbymaraziti
Posts: 111
Joined: Wed Sep 18, 2019 12:19 am

### ST 4A.1A

I've done this problem so many times and I can't get the right answer. Can someone please write out the solution?

Water expands when it freezes. How much work does 100. g of water do when it freezes at 0 deg. C and pushes back the metal wall of a pipe that exerts an opposing pressure of 1070 atm? The densities of water and ice at 0 deg. C are 1.00g/cm^3 and 0.92g/cm^3, respectively.

The answer is w = -.86 kJ.

Chem_Mod
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Joined: Thu Aug 04, 2011 1:53 pm
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### Re: ST 4A.1A

What answer did you get? It might be an error because other students are getting different numbers as well. I got -.94kJ, not -.86kJ.

gabbymaraziti
Posts: 111
Joined: Wed Sep 18, 2019 12:19 am

### Re: ST 4A.1A

Chem_Mod wrote:What answer did you get? It might be an error because other students are getting different numbers as well. I got -.94kJ, not -.86kJ.

I got -.95kJ as well.

Chem_Mod
Posts: 19177
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 833 times

### Re: ST 4A.1A  [ENDORSED]

I have posted a detailed solution to Self-Test 4A.1A at: https://lavelle.chem.ucla.edu/wp-conten ... rs_7Ed.pdf

Hope this helps. :-)

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