Question

Arrange the following in order of increasing entropy.

I. 1.0 mol H₂O (298 K, 1 atm)

II. 1.0 mol H₂O (270 K, 1 atm)

III. 1.0 mol H₂O (400 K, 1 atm)

Options

• II < III < I

• II < I < III

• III < II < I

• I < III < II

Answer 1

II < I < III

Explanation:

For 1.0 mol H₂O:

\[\ce{\underset{270 K, 1 atm}{Solid} < \underset{298 K, 1 atm}{Liquid} < \underset{400K, 1 atm}{Gas}}\]