(74)

Under adiabatic conditions, b=0 and

                                   

Thus, when there is no heat lost from the plate, the temperature profile of the plate will take the same form as its concentration profile.

When w >3, the solute band will have virtually passed through the plate and

         

Thus, when w >3 and the temperature of the plate is recovering, equation (39) becomes

          

or                                  

where                         .