a. Select all processes where entropy is increased:
- Going from 3 microstates to 2 microstates
- Water going from 50°C to 10°C
- NaCl dissolving in water
b. Select all of the spontaneous processes:
- Iron rusting
- Diamond turning into graphite
- A ball rolling down a hill
- Ice melting at -100°C
- Water freezing
- Water melting