lecture7

lecture7 - Prof.Naik 2010 ME 200 Thermodynamics I Lecture 7...

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1 Prof.Naik © 2010 ME 200: Thermodynamics I Lecture 7: Energy Balance – Closed System Last Lecture Concept of Total Energy Prof.Naik © 2010 » Macroscopic Forms: Kinetic Energy and Potential Energy » Microscopic Forms: Internal Energy » Changes in energy are relevant in thermodynamics » Change in total energy E K EP EU 
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2 This Lecture Energy Balance – Closed System Prof.Naik © 2010 Energy Balance – Closed System Conservation of Energy states that energy can neither be created nor destroyed Prof.Naik © 2010 Based on experimental evidence, we can write: » Q = Net heat transfer across system boundary » W = Net work interaction across system boundary » E = Change in total energy within the system In the above equation: » Q and W are path functions » E is a point function
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3 Energy Balance – Closed System (contd.) Sign Convention: » Q > 0 heat transfer to the system Prof.Naik © 2010 » Q 0 heat transfer to the system » W < 0 work done on the system Q = 0
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This note was uploaded on 02/16/2011 for the course ME 200 taught by Professor Gal during the Fall '08 term at Purdue.

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lecture7 - Prof.Naik 2010 ME 200 Thermodynamics I Lecture 7...

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