Surroundings ssys 2 kjk system q ssurr 3 kjk sgen

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ated system. Surroundings ∆Ssys = –2 kJ/K SYSTEM Q ∆ Ssurr = 3 kJ/K Sgen = ∆ Stotal = ∆ Ssys + ∆ Ssurr = 1 kJ/K Some Remarks about Entropy In light of the preceding discussions, we can draw these conclusions: FIGURE 7–8 The entropy change of a system can be negative, but the entropy generation cannot. cen54261_ch07.qxd 11/18/03 9:57 AM Page 280 280 FUNDAMENTALS OF THERMAL-FLUID SCIENCES 1. Processes can occur in a certain direction only, not in any direction. A process must proceed in the direction that complies with the increase of entropy principle, that is, Sgen 0. A process that violates this principle is impossible. This principle often forces chemical reactions to come to a halt before reaching completion. 2. Entropy is a nonconserved property, and there is no such thing as the conservation of entropy principle. Entropy is conserved during the idealized reversible processes only and increases during all actual processes. Therefore, the entropy of the universe is cont...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online