These processes do not occur in the one-dimensional Ising model but do appear in higher dimensions. For a one component system these processes only have one degree of freedom according to a rule named for Gibbs. These processes are classified by the 
These processes do not occur in the one-dimensional Ising model but do appear in higher dimensions. For a one component system these processes only have one degree of freedom according to a rule named for Gibbs. These processes are classified by the degree of their order parameters in Ehrenfest's classification. These processes each have an associated latent heat since they occur at constant temperature. Three of these processes occur simultaneously at a triple point. These processes occur along lines or curves on a diagram that plots pressure and temperature. For 10 points name these processes in which the state of matter changes, exemplified by boiling and freezing.