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# Lec07 - ME 200 Thermodynamics I Lecture 7 Energy balance...

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ME 200: Thermodynamics I Lecture 7: Energy balance for closed systems Section 2.5 Problems: SP7; 2.56, 2.64 Professor Hukam Mongia Office Hours: MWF 2:30 to 3:30 pm in ME 83 (Other times email for appointment) Email: [email protected] 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 9/2/2009 1 Answers: Problem 2.56: 356 kJ; Problem 2.64: (a) 0.3 m3/kg, (b) -36 kJ, (c) 18 kJ/kg

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9/2/2009 2 Joule’s experiment (Groups assignment) Internal Energy + KE+ PE Modes of heat transfer Conduction, convection, radiation and combined modes Lecture 6 covered
9/2/2009 3 This lecture covers Energy balance for closed systems Closed system No mass transfer E1 E2 Heat in Q Work out, W Energy balance: E2+W = E1+Q E2-E1 = Q-W D E = Q-W D KE + D PE + D U = Q-W

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9/2/2009 4 dE = d Q d W Because Q and W are not properties Go through worked-out examples 2.2 through 2.6 on your own.
Problem 2.53: Application of

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Lec07 - ME 200 Thermodynamics I Lecture 7 Energy balance...

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