Question

For which of the following processes would there be a decrease in entropy? A-melting ice
b-separation of compound
c-boiling water
d-freezing water

Answer 1

Entropy is basically a measure of how organized or disorganized energy is in a system of atoms/molecules. Melting ice, separation of a compound, and boiling water all cause a higher dispersion of energy to occur, and so for them entropy is increasing. So which one of the four is left? That will be your answer.