Question

Which sample has the lowest entropy?
(1) 1 mole of KNO3(l) (3) 1 mole of H2O(l)
(2) 1 mole of KNO3(s) (4) 1 mole of H2O(g)

Answer 1

(2) 1 mole of KNO3, because it is a solid, and solid phase has the lowest entropy. Liquid and gas have higher entropy than solid forms.

Answer 2

Entropy is defined as the quantitative physical property, which is unavailable to perform any work. It is also defined as the number of possible arrangements of atoms in a system.

The correct answer is:

Option 2. 1 mole of KNO₃ (s)

Entropy is dependent on:

• Entropy increases with an increase in molecular weight and temperature.

• Entropy for the solid-state will be least, as compared to liquids and gases. Gases have the highest entropies due to random movements of the particles.

• In solids, the atoms are compactly packed and have negligible movement. Thus, the solids will have the lowest entropy.

Therefore, option 2, 1 mole of KNO₃ (s) will have the lowest entropy.

To know more about entropy, refer to the following link:

https://brainly.com/question/15025401