# Lec12 - ME 200: Thermodynamics I Lecture 12: Specific...

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ME 200: Thermodynamics I Lecture 12: Specific heats, incompressible substances Sections 3.9, 3.10 Problems: SP12; 3.84,3.87 Professor Hukam Mongia Office Hours: MWF 2:30 to 3:30 pm in ME 83 (Other times email for appointment) Email: hmongia@purdue.edu Phone: 765-494-5640 Course Website: https://engineering.purdue.edu/ME200 Course Secretaries: Diana Akers (ME 84) and Marilyn Morrison (ME 100) See Kul Inn (ME 189) about grading Homework Assignments 9/8/2009 1 Problem answers:3.84: W 12 =12.75 kJ, Q 12 =491.01 kJ 3.87: 49.3 o C. Prof. Lucht's lecture notes modified

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Last Lecture Property Table Determination of u and h Application of First Law Energy Balance Using Property Table Data 9/8/2009 2 Prof. Lucht's lecture notes modified
This Lecture Specific Heats Further Discussion of Incompressible Substances 9/8/2009 3 Prof. Lucht's lecture notes modified

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Specific Heat Specific heat is the energy required to raise the temperature of a unit mass of a pure substance by one degree In thermodynamics, we consider two important specific heats Constant volume specific heat: describes change in temperature for process with no p d v work (constant volume) Constant pressure specific heat: describes change in temperature for process with p d v work 9/8/2009 4 Prof. Lucht's lecture notes modified
Specific Heat (cont.) Specific Heat at Constant Volume ( c v ) c v is related to change in internal energy per unit

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## This note was uploaded on 05/01/2011 for the course ME 200 taught by Professor Gal during the Spring '08 term at Purdue University-West Lafayette.

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Lec12 - ME 200: Thermodynamics I Lecture 12: Specific...

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