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ENTROPY AND THE SECOND LAW OF THERMODYNAMICS

ENTROPYANDTHE SECOND LAW OF THERMODYNAMICSThe contents of this module were developed under grant award # P116B-001338 from the Fund for the Improve-ment of Postsecondary Education (FIPSE), United States Department of , those contents do not necessarily represent the policy of FIPSE and the Department of Education, and you should not assume endorsement by the Federal STEPHEN THOMPSONMR. JOE STALEYE nergy and entropyfl ow out of the system decreases in entropyAdditional Energy is Additional Energy is Additional Energy is Additional Energy is added to the system,added to the system,added to the system,EnergyReservoirTIMEThe system consists of the red circles in the blue AND THE SECOND LAW OF THERMODYNAMICSCONTENTS2 Introduction To Entro

Second Law of Thermodynamics and can be stated as follows: For combined system and surroundings, en-tropy never decreases. Actually, it always increases. This is really what makes things happen. The fi rst law of thermodynamics, that energy is conserved, just ells us what can happen; it is the second law that makes things go.

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