Which of the following reactions would be expected to have the highest entropy change?

Which of the following reactions would be expected to have the highest entropy change?
A. Liquid → Gas
B. Solid → Liquid
C. Gas → Liquid
D. Gas → Solid

Correct Option: Answer is A
. Liquid → Gas: This increases disorder, so it’s a candidate for high entropy change.
Solid → Liquid: This also increases disorder, but less than gas formation, so it’s possible, but not the strongest candidate.
Gas → Liquid: This decreases disorder, so it’s not expected to have a high entropy change.
Gas → Solid: This significantly decreases disorder, so it’s unlikely to have the highest entropy change.

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