Entropy is a measure of the disorder or randomness of a system. In the context of melting ice, it describes the tendency of ice molecules to become less structured and more random as the ice melts.
A block of ice melts when it absorbs heat from its surroundings, causing the ice molecules to gain energy and break apart from their solid structure. This process is known as melting or phase transition.
As the ice melts, its molecules become less structured and more random, increasing the entropy of the system. The more disordered the molecules are, the higher the entropy.
No, the increase in entropy caused by melting ice cannot be reversed. Once the ice has melted, the molecules have become more disordered and it is not possible to return them to their original state without expending energy.
No, the increase in entropy when ice melts is in accordance with the second law of thermodynamics, which states that the total entropy of a closed system will always increase over time. The melting of ice is a natural and irreversible process that follows this law.