ABSTRACT
The heat transfer process depicted in Figure 7.1 is accompanied by a rise in temperature and an increase in entropy. The rise of temperature means that the mass of the system receiving the energy is finite, i.e., it is not a reservoir. The heat addition is given by
(7.1)
Theoretically this heat transfer can be reversible if the system is placed in contact with an infinite number of reservoirs, each at a temperature which is exactly equal to the system temperature. For such a reversible heat transfer there would be no change of entropy for the ensemble comprising the system and the TER supplying the energy. More realistically modeled the net entropy change would, of course, be positive.
