Chemistry · The second law of thermodynamics: Spontaneity of processes, Delta S of the universe and Delta G of the system as criteria for spontaneity
Which of the following does not result in an increase in entropy?
Which of the following does not result in an increase in entropy?
- A. crystallisation of sucrose from solution
- B. rusting of iron
- C. conversion of ice to water
- D. vapourisation of camphor
Step-by-step solution
Entropy is a measure of disorder. Crystallization involves the transition from a disordered solution to an ordered solid, which decreases entropy (negative ΔS). Rusting of iron (B) also decreases entropy due to consumption of gaseous oxygen, but crystallization is the classic example of entropy decrease. Conversion of ice to water (C) and vaporisation of camphor (D) both increase entropy.
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