ME300Lecture18

ME300Lecture18 - Lecture 18 : Equations of state and...

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18.1 Lecture 18 : Equations of state and Property Relations Ideal gas equation: Compressibility factor: Two-constant equations of state » Van der Waals equation RT a p v b v 2 T T pp at critical point , vv 2 2 00
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18.2 Continue Equations of State Then General form of van der Waals equation: c c c c c c c R T RT RT a , b , v p p p 22 27 3 64 8 8 ' R '' R R R ' R c R c c v / Z v / T v where Z pv / RT, T T /T , and v p v / RT 27 64 18
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18.3 » Redlich-Kwong equation Generalized Redlich-Kwong equation / RT a p v b v(v b)T 12 / cc R T RT with a a' , b b' pp where a' . and b' . 2 5 2 0 42478 0 08664 ' R ' ' 3/2 R RR v Z v v b' T Continue Equations of State
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18.4 Example 18.1 Given A tank of V =23.3 m 3 filled with 1000 kg of water at 360 o C Find the pressure in the tank using the » Ideal gas equation of state » van der Waals equation » Redlich-Kwong equation » Compressibility chart » Steam tables
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18.5 Continue Example 18.1
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18.6 Continue Example 18.1
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18.7 Continue Example 18.1
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18.8 x 0 x 0 yy z z z(x x, y) z(x, y) lim lim x x x z x, y y) x, y y) z(x, y y) y) x, y y) y) y) xy Property Relations
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ME300Lecture18 - Lecture 18 : Equations of state and...

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