What is the Second Law of Thermodynamics in physics

Question

The second law states that in any energy transfer or transformation, the total entropy (a measure of disorder or randomness) of a closed system will always increase over time. This means that energy naturally disperses and spreads out if not hindered. It explains why heat flows from hot to cold and why no process is 100% efficient.

Answer 1

The Second Law of Thermodynamics states that the total entropy of an isolated system can never decrease, and it tends to increase over time, leading to more disorder.

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Answer 2

The Second Law of Thermodynamics states that the total entropy (or disorder) of an isolated system always increases over time, and energy spontaneously disperses from regions of higher concentration to lower concentration. This implies that processes such as heat transfer naturally flow from hot to cold, and no process is 100% efficient, as some energy is always lost as heat.