Question

. If it's not possible to For each chemical reaction listed in the first column of the table below, predict the sign (positive or negative) of the reaction entropy AS decide with the information given, check the "not enough information" button in the last column. Note for advanced students: Assume the temperature remains constant. Assume all gases and solutions are ideal. reaction sign of reaction entropy Ba(OH), -84,0(s) + 2NHC() -- BaC1,(er) + 2NH, () + 10H20 (1) Arno AS not enough information ASO P(NO), (x) + 2K1(04) - PSI, 6) + 2K NO, (4) O ooloo olo oo not enough information ASO 4PC, (-) -- P.6) + 61,6) Aran not enough information XS ?

Answer 1

entropy of gas > entropy of aqueous > entropy of liquid > entropy of solid
This is because gas are more free to move around and hence there randomness is more.
Aqueous compound is mixture of solute and solvent and hence randomness is greater than solid form liquid.
In liquid molecules move more freely than solid. So, entropy of liquid is more than solid.

a)
There are aqueous on product side but only solid on reactant side.
So, there is more entropy on product side than on reactant side.
So, there is increase in entropy
Answer: delta S rxn > 0

b)
There are more aqueous on reactant side.
So, there is more entropy on reactant side than on product side.
So, there is decrease in entropy
Answer: delta S rxn < 0

c)
There are more gas in product than in reactant.
So, there is more entropy on product side than on reactant side.
So, there is increase in entropy
Answer: delta S rxn > 0