In thermodynamics, what quantity always increases in irreversible spontaneous processes within an isolated system?

Answer and explanation

Correct answer: A. Entropy ()

  1. Step 1: In physics under the North Macedonian State Matura syllabus, The Second Law states that the total entropy of an isolated system increases in spontaneous processes. **Answer: Entropy (). Why not the others:** Internal energy results from an incorrect physical formulation.

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