Part A Which state has the higher entropy? Which state has the higher entropy? a

Question

Part A Which state has the higher entropy? Which state has the higher entropy?
a.) a perfectly ordered crystal of solid nitrous oxide (NNO)
b.)a disordered crystal in which the molecules nitrous oxide (NNO) are oriented randomly

Part B Which state has the higher entropy? Which state has the higher entropy? "plastic" sulfur or crystalline sulphur,

Part C Which state has the higher entropy? Which state has the higher entropy? 1 mol of N2 gas at 273 K in a volume of 11.2 L or 1 mol of N2 gas at STP

Part D Which state has the higher entropy? Which state has the higher entropy? 1 mol of N2 gas at STP or 1 mol of N2 gas at 273 K and 0.25 atm

Part E   Which of the following processes has negative entropy change?

a.) 2 KClO3(s) 2 KCl(s) + 3O2 (g) b.) BaSO4 (s) Ba2+(aq) + SO42(aq) c.) 3 Fe(s) + 2 O2(g) Fe3O4(s) d.) C2H5OH(l) C2H5OH(g)

Explanation / Answer

1 Entropy is degree of disorder and hence entropy increases with an increase in disorder. Hence a disrodered crystal of N-N-O will have higher entropy

2. plstic sulfur will have more entropy.

3 when the volume increases, the has is compressed so orderness increases. Hence 1 mole f N2 at STP occupies 22.4 L will have more entropy.

4. N2 gas at 0.25 atm will have more entropy.

5. solids will have least disorder. Hence gases will have more disorder. Hence solid will have less entropy than gas

entropy change= entopy of the products- entropy of reactants

on these grounds, 3Fe(s)+ 2O2(g)---------> Fe3O4 will have -ve entropy change.

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