Entropy in a system can be decreased by adding energy through work, such as gathering marbles or converting materials. The second law of thermodynamics mandates that while local entropy can decrease, total entropy in the universe must increase or stay constant.
Entropy is a measure of disorder or randomness in a system. One way to decrease entropy in a system is by adding energy to the system through work, such as gathering scattered marbles into a cup or converting iron ore into steel.
According to the second law of thermodynamics, while it is possible to reduce the entropy of a specific system by adding energy, the total entropy of the entire universe must increase or remain constant.
Energy transfers, like those from the Sun, can lead to local decreases in entropy within a system but result in an overall increase in entropy in the universe to comply with the second law of thermodynamics.
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