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When a system is taken
from state a to state b in Fig.
along path acb, 90.0 J of heat flows
into the system and 60.0 J of work is
done by the system. (a) How much
heat flows into the system along path
adb if the work done by the system
is 15.0 J? (b) When the system is returned
from b to a along the curved
path, the absolute value of the work
done by the system is 35.0 J. Does
the system absorb or liberate heat? How much heat? (c) If Ua = 0 and
Ud = 8.0 J, find the heat absorbed in the processes ad and db.
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