Lec04_drobny_11

# Lec04_drobny_11 - Lecture 4:Pathways Reading Zumdahl 9.4...

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Lecture 4:Pathways • Reading: Zumdahl 9.4, 9.5 • Outline – Example of Thermo. Pathways – State Functions – (9.4…for laboratory)

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Thermodynamic Pathways: an Example • Example 9.2. We take 2.00 mol of an ideal monatomic gas undergo the following: – Initial (State A): P A = 2.00 atm, V A = 10.0 L – Final (State B): P B = 1.00 atm, V B = 30.0 L We’ll do this two ways: Path 1 : Expansion then Cooling Path 2 : Cooling then Expansion
Thermodynamic Jargon • When doing pathways, we usually keep one variable constant. The language used to indicate what is held constant is: – Isobaric: Constant Pressure Δ P=0 – Isothermal: Constant Temperature Δ P=0 – Isochoric: Constant Volume

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Thermodynamic Path: A series of manipulations of a system that takes the system from an initial state to a Fnal state isochoric isobaric
Pathway 1 • Step 1. Constant pressure expansion (P = 2 atm) from 10.0 L to 30.0 L. – P

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Lec04_drobny_11 - Lecture 4:Pathways Reading Zumdahl 9.4...

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