Question

For a liquid, which would you expect to be larger: ΔS_fusion or ΔS_evaporation? Why?

Short answer

ΔS_evaporationis larger than ΔS_fusionas gases possess most randomness as compared to liquid and solids.

Step-by-step solution

Definition of Entropy 

ΔS_fusion is the entropy change during the change of a substance from solid to liquid.

ΔS_evaporation is the entropy change during a change of a substance from liquid to gas.

Explanation  

Entropy is a measure of randomness as randomness increases, entropy increases.

As Randomness increases from solid to gas so Entropy also changes as

S_solid < S_liquid< S_gas

But the entropies of gases are very high as compared to liquids, as gases occupy very high volume and space. So, difference in

S_gas - S_liquid>S_liquid- S_solid

Thus, we can say that ΔS_evaporation> ΔS_fusion.