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process. However, considering that entropy is a property and the values of properties depend on the state of a system, we can argue that the entropy change of
the partition is zero since the partition appears to have undergone a steady
process and thus experienced no change in its properties at any point. We base
this argument on the fact that the temperature on both sides of the partition
and thus throughout remained constant during this process. Therefore, we are
justified to assume that Spartition 0 since the entropy (as well as the energy)
content of the partition remained constant during this process.
The entropy change for each reservoir can be determined from Eq. 7–6 since
each reservoir undergoes an internally reversible, isothermal process.
(a) For the heat transfer process to a sink at 500 K: cen54261_ch07.qxd 11/18/03 9:57 AM Page 281 281
CHAPTER 7 Ssource
Qsink 2000 kJ
500 K and Sgen Stotal Ssourc...
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