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Unformatted text preview: = = = 1 2 1 1 2 1 1 1 2 1 12 ln V V V P dV V V P PdV W = = 1 2 1 2 2 2 ln ln V V mRT V V V P Polytropic ( PV n = const.) ideal gas: ( ) n V V V P dV V V P PdV W n n n n n = = = 1 1 1 1 2 1 1 2 1 1 1 2 1 12 ( ) ( ) n V P V P n V V P V V P n n n n = = 1 1 1 1 2 2 1 1 1 1 1 2 2 2 ( ) n T T mR = 1 1 2 For any quasistatic process in a closed system, the work is proportional to the area under the curve of a pressurevolume diagram. If volume is increasing during the process (1 to 2 on the figure at right) work will be positive, while if it is decreasing (2 to 1 on the figure) it will be negative. P V W 1 2...
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This note was uploaded on 04/10/2009 for the course ME 2124 taught by Professor Uzgoren during the Spring '08 term at Virginia Tech.
 Spring '08
 Uzgoren

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