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HW:Thermodynamics II: Entropy...
gladstone.a@husky.neu.edu
10/02/19
Rank the following solutes in order of increasing entropy when 0.0100 moles of each dissolve in 1.00 liter of water.
Question list (4 items)
(Drag and drop into the appropriate area)
Correct answer list
Least Entropy
Cr(NO3)3
1
No more
NaBr
items
CaCl2
3
CH3OH
4
Most Entropy
<04/12
4 VIEW SOLUTION
C TRY AGAIN
4 OF 12 QUESTIONS COMPLETED
12:36 PM
Ei
Type here to search
9/12/2019
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X For You - Xfinity Stream b Answered: Microsoft PowerPoint x Smartwork5 X Digital Resources for Chemistry X digital.wwnorton.com/17995 50% HW:Thermodynamics II: Entropy... gladstone.a@husky.neu.edu 10/02/19 Rank the following solutes in order of increasing entropy when 0.0100 moles of each dissolve in 1.00 liter of water. Question list (4 items) (Drag and drop into the appropriate area) Correct answer list Least Entropy Cr(NO3)3 1 No more NaBr items CaCl2 3 CH3OH 4 Most Entropy <04/12 4 VIEW SOLUTION C TRY AGAIN 4 OF 12 QUESTIONS COMPLETED 12:36 PM Ei Type here to search 9/12/2019

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Expert Answer

Step 1

Entropy means dis-orderness here the ions disorderness (moments).

The number of ions increase means the disorderness increase.

Cr (NO) 3)3 (0.0100 moles) dissolved in 1 liter water.  There are three ions present in solution like Cr3+ and 3 (NO)-3.  Totally four ions so entropy is more for this solution.

Step 2

NaBr (0.0100 moles) dissolved in 1 liter water.  There are two ions present in solution like Na+ and Br-.  Totally two ions present so entropy is less for this solution.

CaCl2 (0.0100 moles) dissolved in 1 liter water.  There are three ions present in solution like Ca2+ and 2Cl-.  Totally four ions present so entropy is more for this solution.

Step 3

CH3OH is polar solvent so it is soluble water (polar solvent) so there is no ions...

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