pete 203: thermodynamics
TRANSCRIPT
PETE 203: Thermodynamics
Prepared by:
Brosk Frya Ali Zangana
Koya University, Faculty of Engineering,
Petroleum Engineering Department
2013 – 2014
Lecture no. (6 & 7)
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Thermodynamics Lecture NO. 6 & 7
Properties of pure substance
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Phases of a pure substance
Thermodynamics Lecture NO. 6 & 7
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Thermodynamics Lecture NO. 6 & 7
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Phase – Change Processes Of Pure Substances
Thermodynamics Lecture NO. 6 & 7
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Thermodynamics Lecture NO. 6 & 7
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Thermodynamics Lecture NO. 6 & 7
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Thermodynamics Lecture NO. 6 & 7
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Thermodynamics Lecture NO. 6 & 7
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Figure 1: T-v diagram representing phase change for water at constant pressure.
Thermodynamics Lecture NO. 6 & 7
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Saturation Temperature And Saturation Pressure
Thermodynamics Lecture NO. 6 & 7
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Thermodynamics Lecture NO. 6 & 7
Property Diagrams for Phase Change Processes
T-v Diagram
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Thermodynamics Lecture NO. 6 & 7
Figure 2: T-v diagram.
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Thermodynamics Lecture NO. 6 & 7
Figure 3: T-v diagram and
saturation lines.
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Thermodynamics Lecture NO. 6 & 7
P-v Diagram
Figure 4: P-v diagram.
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Thermodynamics Lecture NO. 6 & 7
Figure 5: P-v diagram for a substance that contracts during freezing (left) and for a substance that expends during freezing
(right).
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Thermodynamics Lecture NO. 6 & 7
Triple point
Until now, we have defined the equilibrium between two phases.
However, under certain conditions, water can exist at the same time as
ice (solid), liquid and vapor. Theses conditions define the so called
triple point.
On a P-T diagram, these conditions are represented by a point.
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Thermodynamics Lecture NO. 6 & 7
Figure 6: P-T diagram and
the triple point.