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

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:

A)negative
B)positive
C)close to zero

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


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

B)formation solid rust (iron(III) oxide) by oxygen in the air reacting with the iron in an old boat

C)alignment of iron filings in a magnetic field

D)formation a liquid by compressing a gas

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

Explanation / Answer

A C

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