The Second Law

Second Law
•
Puts restrictions on useful conversion of q to w
•
Follows from observation of a directionality to natural or spontaneous processes
•
Provides a set of principles for
- determining the direction of spontaneous change
-determining equilibrium state of system
Heat reservoir Definition: A very large system of uniform T, which does not change regardless of the amount of heat added or withdrawn.
Also called heat bath. Real systems can come close to this idealization.Second Law
•
Puts restrictions on useful conversion of q to w
•
Follows from observation of a directionality to natural or spontaneous processes
•
Provides a set of principles for
- determining the direction of spontaneous change
-determining equilibrium state of system
Heat reservoir Definition: A very large system of uniform T, which does not change regardless of the amount of heat added or withdrawn.
Also called heat bath. Real systems can come close to this idealization.Second Law
•
Puts restrictions on useful conversion of q to w
•
Follows from observation of a directionality to natural or spontaneous processes
•
Provides a set of principles for
- determining the direction of spontaneous change
-determining equilibrium state of system
Heat reservoir Definition: A very large system of uniform T, which does not change regardless of the amount of heat added or withdrawn.
Also called heat bath. Real systems can come close to this idealization.