The second law and chemically-induced, steady-state pressure gradients: controversy, corroboration and caveats

Experimental results are reported supporting key aspects of a recently prop osed chemical pressure gradient (D.P. Sheehan, Phys. Rev. E 57 (1998) 6660) . This pressure gradient has been invoked in a paradox involving the second law of thermodynamics (T.L. Duncan, Phys. Rev. E 61 (2000);1661). (C) 2001 Elsevier Science B.V. All rights reserved.