Two gases mixed together do not separate by themselves because:

  1. energy is lost
  2. they become one gas
  3. they react
  4. the mixed state has far more possible arrangements
Answer

D) the mixed state has far more possible arrangements

Separation would lower entropy. SLO P-11-C-21 · Understanding

Physics MCQ · More Heat Engines, Second Law and Entropy MCQs · Practise