Table 6.1 Sign Conventions for q, w and DE
q
w
+
=
DE
+
+
-
-
-
-
+
+
+
-
depends on magnitudes of q and w
depends on magnitudes of q and w
For q: (+) means system gains heat, (-) means system loses heat.
For w: (+) means work done on system, (-) means work done by system.
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