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Which of the following processes involve(s) a net decrease of entropy?
I. The condensation of steam
II. The freezing of methanol
III. The evaporation of ethanol
IV. The boiling of water
a. III only
b. I and II
c. II and III
d. I, II, and IV
e. I, II, III, and IV



Answer :

Answer:

the answer is B(I and II)

Explanation:

this is because entropy is the degree of disorderliness in a chemical system and in options III and IV evaporation and boiling turns the substance gaseous thereby increasing the disorderliness in the chemical system

but in the other hand condensation and freezing turns the substance liquid and solid respectively and this states of matter have a lower entropy than gaseous state

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