Answer:
c. 2H₂O → 2H₂ + O₂
Step-by-step explanation:
Entropy is the state of randomness or disorderliness of the particles of a system. The more random and disorderly a system is, the more its entropy. When the physical state of matter changes, there is a considerable change in the entropy of such a system.
The increasing order of entropy is as listed below:
Solid < liquid < gas
Gases have the highest randomness in all states of matter.
From the equation of the reaction in option C, we see that water is going into the gaseous phase. The products of the reaction are hydrogen and oxygen gases. This is an increase in entropy.
Reaction B and D produced ions which are in aqeous solutions. They move from originally solid sate to a liquid phase.
Reaction A takes gases and turns them into water. This is a decrease in entropy.