Which of the following involve an increase in the entropy of the system?
Which of the following processes involve an increase in the entropy of the system?
a. Melting of a solid
b. Sublimation
c. Freezing
d. Mixing
e. Separation
f. Boiling
2 Answers
Guessing entropy is always a tough one in thermo, but here is mine and reasoning:
a. melting of a solid – increase- a melted substance has more disorder and options than a solid, hence more entropy
b) sublimation -increase – because system needs energy to go from a solid state to a gas state so there is more options of order
c) freezing – NO INCREASE – freezing has more order to molecules and less options of arrangement then the liquid
d) mixing- increase – mixing increases the “multiplicity” of the system, which is proportional to number of ways you can recreate this state.
e) separation -NO INCREASE- because multiplicity is decreased and less options of possible molecule arrangement in a separation. More order is added to system
f) boiling – increase- molecules go from a liquid to a gas. The gas molecules have more disorder and possible arrangements over a liquid
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