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Unformatted text preview: • Change in Specific Enthalpy: -=-+ (-) h2 h1 u2 u1 v p2 p1 and -= (-)+ (-) h2 h1 c T2 T1 v p2 p1 • Universal Gas Constant: = . R 8 314 kJkmole∙K and = R RM • Ideal Gas Model: • = pv RT • = pV mRT with = v Vm • = pv RT using = v vM and = R RM and = M molecular weight • = pV nRT using = v Vn • Change in Specific Internal Energy: -= uT2 uT1 T1T2cvTdT • Change in Specific Enthalpy: -= hT2 hT1 T1T2cpTdT • = + cpT cvT R • = + cpT cvT R • when = ( ) ( ) k cp T cv T … =-cpT kRk 1 and =-cvT Rk 1 •- ( )= (-) uT2 u T1 cv T2 T1 •- ( )= (-) hT2 h T1 cp T2 T1 • Polytropic Process: • = pVn constant • = p1V1n p2V2n so =( ) p2p1 V1V2 n • = =--W 12p dV p2V2 p1V11 n • For Constant Pressure: = = (-) W 12pdV P V2 V1 • Isothermal Process: = = ( ) W P1V1lnV2V1 mRTln V2V1 • 1 st Law of Thermodynamics for a Closed System: -=-+ + Q W mu2 u1 ∆KE ∆PE ….neglect KE and PE (they go to 0) •...
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- Spring '11