Entropy — true or false?

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   Entropy of the universe always increases in a spontaneous process.

2. Statement is true

   Yes

   Statement

   Entropy of a perfect crystal at 0 K is zero (3rd law).

3. Statement is true

   No

   Statement

   Liquid water has lower entropy than ice at the same temperature.

4. Statement is true

   No

   Statement

   Mixing two ideal gases decreases entropy.

5. Statement is true

   Yes

   Statement

   Entropy is a state function.