Question

Which of the following processes shows an increase in entropy?

• A. A pond freezes in winter.
• B. Solid iodine sublimes.
• C. Condensation occurs on the bathroom mirror.
• D. Gaseous hydrogen and oxygen react to form water
• E. A sugar solution crystallizes.

Answer 1

The correct option is B Solid iodine sublimes.

Entropy increase that means randomness of system increases.
$a>$ when a pond freezes it goes from liquid to solid state thus decreasing randomness and hence entropy decreases.
$b>$ solid iodine sublimes and changes to gaseous state increasing randomness and hence entropy.
$c>$ condensation on the bathroom mirror decreases entropy.
$d>$ following this rule gaseous hydrogen and oxygen reacts to form water causes decrease in entropy..
$e>$ same is the case when sugar solution crystallizes, it causes decrease in entropy