Which of the following involve an increase in the entropy of the system?

Which of the following 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

  • sublimation, metling a solid, boiling en mixing. All these processes increase the number of ways the particles can be placed in the space, thus increasing entropy.

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