An inventor has devised a complicated nonflow process in which 1 mol of air is the working fluid. The net effects of the process are claimed to be: • A change in state of the air from 250°C and 3 bar to 80°C and 1 bar • The production of 1,800 J of work The transfer of an undisclosed amount of heat to a heat reservoir at 30°C Determine whether the claimed performance of the process is consistent with the second law. 7 Assume that air is an ideal gas for which Cp = -R. 2

What are the tear variables in the SR method?

Under what conditions is a membrane cascade of multiple stages in series necessary?

What can be said about the three distillate (s) and bottoms products that would be produced in any column that is designed and operated as shown?