MCQ
For a spontaneous process:
  • A
    enthalpy change of the system must be negative
  • B
    entropy change of the system must be positive
  • C
    entropy change of the surrounding must be positive
  • D
    entropy change of the system plus surrounding must be positive

Answer

  1. entropy change of the system plus surrounding must be positive

Explanation:

For a  spontaneous process the randomness  of the molecules in the system increases so the entropy change of the system and surroundings must be positive.

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