ืnor is the situation much improved(from the umdergraduate is viewpoint) if the discussion is based from the outset on the rather sophisticated concept of entropy and the second law stated in terms of the increase of entropy in natural processes. this treatment is defensible on strictly logical grounds,but it has the defect of presenting thermodynamics as a completed edifice, and the student who csn see how a stucture came to be erected is in a far better position to enlarge it