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(a) In a chemical reaction one mole of gas reacts with a liquid generating anoth

ID: 809086 • Letter: #

Question

(a) In a chemical reaction one mole of gas reacts with a liquid generating another liquid and one mole of another gas. Would you expect DS to be positive, negative, or close to zero for this reaction?


DS for this reaction should be: (positive, negative, or close to zero)?





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


ice cubes melting at -5 oC and 1 atm pressure

a balloon heated with a flame bursts releasing its contents

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

detonation of some dynamite

the dissolution of HCl(g) in water to form hydrochloric acid

Explanation / Answer

positive

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