Problem: For which of the following processes would you expect there to be an increase in entropy? Ag+(aq) + Cl–(aq) → AgCl(s) H2O(g) → H2O(l) CaBr2(s) → Ca2+(aq) + 2 Br–(aq) CO2(g) → CO2(s) N2(g) + 3 F2(g) → 2 NF3(g)

FREE Expert Solution

We’re being asked to determine the processes that would you expect there to be an increase in entropy. Recall that if:

• ΔS > 0 or ΔS = (+); entropy is increased

• ΔS < 0 or ΔS = (–); entropy is decreased


Remember that phase changes lead to a change in entropy:



Also, recall that an increase in the number of gas molecules in the reaction also leads to an increase in entropy.


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Problem Details

For which of the following processes would you expect there to be an increase in entropy? 

Ag+(aq) + Cl(aq) → AgCl(s) 

H2O(g) → H2O(l) 

CaBr2(s) → Ca2+(aq) + 2 Br(aq) 

CO2(g) → CO2(s) 

N2(g) + 3 F2(g) → 2 NF3(g)

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