Question

question 18 (4 points)
consider a pure crystalline solid that is heated from absolute zero to a temperature above the boiling point of the liquid. which of the following processes produces the greatest increase in the entropy of the substance?
a) heating the liquid
b) heating the gas
c) heating the solid
d) vaporizing the liquid

Explanation:

Entropy is a measure of disorder. Phase changes (like vaporization) involve larger changes in disorder than heating within a phase. Vaporizing liquid (liquid to gas) has a huge increase in disorder (gas has much more randomness than liquid). Heating solid/liquid/gas increases entropy but less than a phase change from liquid to gas. So vaporizing the liquid (option d) gives the greatest entropy increase.

Answer:

d) vaporizing the liquid