A thought experiment in which an imaginary creature guards a trapdoor between a two-part gas container was proposed to try to violate this law.
The original Thomsen-Berthelot principle, also known as the principle of maximum work, was shown to violate this law because it failed to incorporate irreversibility. The Kelvin-Planck statement is one component of this law, and a flaw in Boltzmann's H-theorem concerning this law and time reversal symmetry is Loschmidt's paradox. A thought experiment in which an imaginary creature guards a trapdoor between a two-part gas container was proposed to try to violate this law. Clausius stated it as heat cannot flow from a hot object to a cold one spontaneously. For 10 points, name this law which says that the entropy of a system increases until it reaches equilibrium.
The original Thomsen-Berthelot principle, also known as the principle of maximum work, was shown to violate this law because it failed to incorporate irreversibility.
 second law of thermodynamics