The Second Law of thermodynamics allows work to be transformed fully into heat, but forbids heat to be totally converted into work. If heat could be transformed fully into work it would violate the laws of entropy.

What are the laws of entropy that would be violated if heat could be fully transferred into work?

• Clausius $\oint \frac{\delta Q_{rev}}{T}=0$ – hyportnex Aug 22 '18 at 23:39
• @hyportnex That looks like it should be an answer, not a comment – David Z Aug 23 '18 at 0:10
• The second law doesn’t say that. Please look it up relative to heat and work, and see what you left out. – Chet Miller Aug 23 '18 at 1:47