che320_class6edited

# che320_class6edited - 6 Cubic equations of state today RK...

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6 Cubic equations of state today . RK, SRK, PR equations of state solving general equations numerically residual properties announce . No class Mon 07sep2009 (Labor Day). No review session Mon 07sep2009 4 pm. 1 st exam (8 am on Fri 18sep2009, 111 Wartik). 1 Midterm exam Mon 05oct2009 from 8:15-11:15. assignments . HW 02 due before class Wed 09sep2009. reading: Ch 03, start Ch 04

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Example. Change in enthalpy of 1 kg air A fairly rigid container holds 1.0 kg of air at P = 2.0 bar and T = 310 K. How much heat is required to bring the temperature to 700 K, if the air acts as an ideal gas? 2
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Example. Change in enthalpy of 1 kg water A fairly rigid container holds 1.0 kg of air at P = 1.0 bar and T = 277 K (= 4 C). How much heat is required to bring the water to 283 K, if the pressure in the container grows to 2.7 bar? 5

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Redlich-Kwong equation of state 6
Soave-Redlich-Kwong equation of state Only the def of “a” is different. 7 It includes “acentric factor” ( ω ) for T dependence.

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Peng-Robinson equation of state 8
Data for various materials 9

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Data for various materials 10
Isotherms of water from SRK EOS 11

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