Lecture09_Evaluating properties-handout

Lecture09_Evaluating properties-handout - ME200...

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1 Professor: Euiwon Bae Lecture Hours : MWF 1:30-2:20 in ME1130 Office Hours : MWF 2:30-3:30 in ME15 Email : [email protected] Phone : 765-494-6849 Course website : http://engineering.purdue.edu/ME200 ME200 : Thermodynamics I Lecture 9 : Evaluating properties
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2 Announcement Bring textbook for the Wed/Fri lecture Will practice on evaluating the properties 1 st Exam on Sep 20 th 8-9 PM at CL50 Room 224 Lecture 1-11 Make sure correct the COP with W cycle = Q out -Q in from Lecture 8
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3 Outline Phase P-v-T diagram Phase change
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4 Phase & pure substance - Pure substance : quantity of matter that is homogeneous in chemical and physical characteristics - Example : water (H O) Single & two phase
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5 Phase & pure substance - Phase change Phase change Gas Liquid Solid
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6 Phase & pure substance - Pure substance: uniform and invariable in chemical composition - Example : water in two phase ( same H 2 O) - Example : air (78% nitrogen, 20% oxygen, 1% argon) stable and doesn’t chemically react Determining the state - Not all intensive properties are independent - States can be uniquely determine by certain # of independent variables State principle -
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