The Clausius statement of the second law says:

  1. energy is created in engines
  2. temperature is constant
  3. all heat can be converted into work
  4. heat cannot flow by itself from a colder body to a hotter body
Answer

D) heat cannot flow by itself from a colder body to a hotter body

A refrigerator needs work. SLO P-11-C-15 · Understanding

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