Re: Can the rate of Entropy generated be negative.

If you are asking what I think you are asking (I can't be sure because I 
do not have Sandler's book), the answer is "Yes."

It is only in *isolated* systems that the entropy must increase by the 
Second Law of Thermodynamics.  If a system is not isolated (in other 
words, if heat or mass is flowing across the boundary), then it is 
possible for entropy to decrease in a system.  For example, if you freeze 
a liquid into a solid, its entropy will decrease.  More simply, a 
reversable removal of heat from a system will decrease the entropy by 
dQ/T. So it is indeed possible for the entropy of the system one is 
considering to have a negative rate of entropy change, as long as it is 
not isolated.

If this is not the question you were asking (and I wonder if it might not 
be because of the unusual terminology of "generation" of entropy), try 
submitting again with a more complete explanation of what you mean.  Or, 
of course (and this might be a better route to take overall), you could 
ask the teacher of the course you are taking.  Most teachers are 
encouraged when students care enough to ask them questions like this, even 
if they have to think a while to come up with the answer.

Allan Harvey
"Don't blame the government for what I say, or vice-versa."