Answer: melting gold bars
Step-by-step explanation:
Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.
1. Condensing water vapor: gaseous phase is being converted to liquid phase, thus the randomness is decreasing.
2. Melting gold bars: Solid phase is being converted to liquid phase, thus the randomness is increasing.
3. filtering grounds from coffee: The randomness is decreasing as some particles are being removed.
4. freezing popsicles: liquid phase is converting to solid phase, thus the randomness is decreasing.