Question

(a) In a chemical reaction a solid material dissolves forming ions and disperses throughout an aqueous solution. Would you expect DS to be positive, negative, or close to zero for this reaction?

DS for this reaction should ---Select--- be positive, be negative, or be close to zero .

(b) In which of the processes described below should the entropy increase? Choose all of the correct possibilities.

1) ice cubes melting at -5 oC and 1 atm pressure

2) breakdown of large molecules into smaller ones during digestion of a meal

3) the reaction of nitrogen atoms to form N2 molecules at 25^oC and 1 atm

4) formation of CH4(g) and O2(g) molecules from CO2(g) and H2O(l) at room temperature and 1 atm pressure

5) separating a mixture of nitrogen and oxygen gases into pure nitrogen and pure oxygen

Answer 1

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