The first law does NOT tell us:

  1. the direction in which heat flows naturally
  2. that energy is conserved
  3. how heat and work change internal energy
  4. that Delta U = Q - W
Answer

A) the direction in which heat flows naturally

That is the second law. SLO P-11-C-11 · Application

Physics MCQ · More Kinetic Theory and First Law of Thermodynamics MCQs · Practise