Q. In which case change in entropy is negative ?
A) Evaporation of water
B) Expansion of a gas at constant temperature
C) Sublimation of solid to gas
D) $2H(g) \rightarrow H_2(g)$
Explanation
[Solution] Two gaseous atoms combine into one molecule, decreasing disorder. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.