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Which of these processes result in an entropy decrease of the system?

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Which of these processes result in an entropy decrease of the system?

Post  pplantblues on Sat Jan 31, 2009 4:22 pm

Which of these processes result in an entropy decrease of the system?
Check all that apply.

a. Diluting hydrochloric acid
b. Boiling water
c. 2NO(g) + O2(g) = 2NO2(g)
d. Making ices cubes in the freezer
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Re: Which of these processes result in an entropy decrease of the system?

Post  funion987 on Sat Jan 31, 2009 4:28 pm

I'm sure Bfrsoccer could tell you. (I haven't done entropy yet)
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Re: Which of these processes result in an entropy decrease of the system?

Post  bfrsoccer on Sun Feb 01, 2009 2:40 pm

I think the entropy of the system would decrease in c and d. In c, you're left with less moles of gas, and in d, the system becomes in a more fixed and inflexible state (I haven't done much with entropy in a while, though).
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Re: Which of these processes result in an entropy decrease of the system?

Post  pplantblues on Sun Feb 01, 2009 7:21 pm

You are right! Good job! :-)
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Re: Which of these processes result in an entropy decrease of the system?

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