版权所有：华东理工大学物理化学教研室 3 1) The reaction Gibbs energy ⇔ BA 9.1 The Gibbs energy minimum For the simplest possible chemical equilibrium Suppose an infinitesimal amount dξ of A turns into B: The change in the amount of A present is dnA = -dξ The change in the amount of B present is dnB = + dξ . The quantity ξ is called the extent of reaction; The dimensions is amount of substance, (moles).版权所有：华东理工大学物理化学教研室 3 1) The reaction Gibbs energy ⇔ BA 9.1 The Gibbs energy minimum For the simplest possible chemical equilibrium Suppose an infinitesimal amount dξ of A turns into B: The change in the amount of A present is dnA = -dξ The change in the amount of B present is dnB = + dξ . The quantity ξ is called the extent of reaction; The dimensions is amount of substance, (moles)