lecture_0118

lecture_0118 - 1 st law of thermodynamics Define the system...

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Systems and Equilibria EES 103 18 January 2011
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Systems Characteristics Stocks Flows Sources Sinks Residence time
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Materials balance Conservation of mass General formula Steady-state formula Example: convergence of two streams Steady-state with non-conservative pollutants Example: concentration in a smoky bar
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System properties Types of equilibrium Static equilibrium Steady-state equilibrium Dynamic equilibrium Characteristic times Residence time Transit time Mixing time Chemical reaction time Exponential times Equilibrium time
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Feedback loops Positive vs. Negative Definitions Human examples Environmental examples Clicker Quiz: What type of feedback loop is human perspiration ? A) positive B) negative C) neither output does not affect input
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Energy balance
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Unformatted text preview: 1 st law of thermodynamics Define the system Open systems vs. closed systems General formula Example: water heater Energy balance 2 nd law of thermodynamics Mechanisms of heat transfer General formula Example: savings from insulation Further concepts Homeostasis Emergent properties Things to think about: Scale of system / system boundaries Internal processes Equilibrium Coming up Online task before each class Assignment #1 due Tuesday, January 25 th Office hours: Professor Berger: Tues 2:30-4:00 Wed night ONLINE 9:00-10:00pm Or by appointment please email TA Joey Griggs: Mondays 1-3pm in Gleason Library...
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This document was uploaded on 05/16/2011.

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lecture_0118 - 1 st law of thermodynamics Define the system...

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