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exam1 - Chem 331 Fall 2004 13 Oct 04 Exam 1 1/6 Please show...

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Chem 331, Fall 2004 Exam 1 1/6 13 Oct 04 Please show work clearly. Partial credit will be given on all problems except where noted. Calculators and one sheet of paper with equations on one side are allowed. Name: _______________________________________________________ 1: ________/5 2: ________/10 3: ________/18 4: ________/16 5: ________/16 6: ________/35 pV = nRT gases tot i i p p = x i = n i /n tot p i = x i *p tot ( ) 2 2 n p a V nb nRT V + = Van der Waals gas dU = đ q + đ w đ w = - p ext dV U = 3/2 nRT + const. (ideal, monatomic gas) U = 5/2 nRT + const. (ideal, diatomic gas) H U PV + C P = C V + nR (ideal gas) V V V dq C dT V V U C T = dU = C V dT (ideal gas) P P P dq C dT P P H C T = dH = C P dT (ideal gas) dq P = dH p V C C γ = , / 2 1 1 1 2 2 1 2 ; V m R C T V PV PV T V γ γ = = (adiabatic proc., ideal gas) Products Reactants f f H v H v ° = ° − ° f H 2 1 2 1 ( ) ( ) T r r r P T H T H T C dT ° = ∆ ° + ° 0 0 , , Products Reactants r P P m P m C vC v ° = C dS = dq rev / T dS surr = - dq / T surr S tot = S + S surr S tot > 0 for irreversible process R = 8.31 J K -1 mol -1 = 0.08206 L atm K -1 mol -1 = 0.08314 L bar K -1 mol -1 1 atm = 101.325 kPa = 1.013 bar = 760 torr 1 L-atm = 101.325 J 1 L = 1000 mL 1 kJ = 1000 J = 1 kg m 2 s -2 1 mL = 1 cm 3 T (K) = T (°C) + 273.15
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