General College Chemistry I: Discussion worksheet - Week 8 (with solution) | CHEM 112, Exercises of Chemistry

Download General College Chemistry I: Discussion worksheet - Week 8 (with solution) | CHEM 112 and more Exercises Chemistry in PDF only on Docsity! \ -2- Chemistry 112 - Spring 2009 Dr, Audrey Dell Hammorich Discussion Worksheet - Week 8 consmwr Tem reerieg, 1, Draw three Gothermsyfor a gas showing the relationship between P and V at constant T if the gas a) were idcal, b) were real, or c) were to follow the van der Waals equation of state. Explain your sketches. Ves DERM ends - Prise Iden PunSE Re tthe 8 TRANS TION a er (Px aa° (v-nb Pe ve P v ) y =nkr Pp N 2. Draw a phase diagram for a simplo pure substance that exhibits three different phases: solid, liquid, gas and whose solid has a greater density than the liquid. Identify what each line and each unique point in your sketch corre- sponds to. T- Tepe Pow (RT were: — Panses Couns ) Stove Positis Siwee O- Cuncak row CP REowo forncu L POD @ dys deer Vad Vy De Der CORNET fon Zocrense top P T,C UNE owes PT Brion Foe 2S ATOQVS ANT T FANDRe “w & “6 4 " ssa PRase Orn Shae | 4 hr eos A « 2 = Mp Teerwses 1B SS a Tn © disrgesiw 3. Pat a check for the dominant intermolecular attractive force, 4, Cirele the molecule that has the property. cone WERE | molecule | dipole-dipole | ion-dipole | dispersion | H bonding property molecule [MOSHE Ar(g) Wi higher vapor pressure cp HE ® KI (aq) J higher boiling point (NaCl) | Nal >) BR ¥ higher boiling point NH) | PH |S aEDROEE H,0(s) J lower vapor pressure Cl G> (O moat CIF(g) v lower boiling point H,0 G5 4 BCom Crone Or PTTRACTOD DECRehdes WIT SIZE 5, When are the molarity and molality of a solution approximately equal? CW TOR TEL Dikure Me TM ary 27 Vety DinnTe SrvTidos Viebyo = Llegd WL agit go = 6, What i $f the density of a 9.9 M, 50.0 mass percent solution of ethanol (C)H5OH) in water? [0.91 g mL’ 4 o 46,0684 $0.0 Ti Oe x densi ity pikes, <7? d> Valo) 4g, og) | 50,0 7, An aqueous solution contains equal amounts ras waler and nitric acid by mass, =? Y 4 a0 = ag BNOs wy a) What is the mole fraction of HNQ; in the solution? [0.22233] . wooy- Pua Yie3.on4 0 "SOE Hole FD Twa. * ~ 0.292331 eH wee? 430 -¥fo3.ong+ y 18.008 > Wa . b) What is the molality of HNO; in the solution? [15.870 m] 20 * y 1.0148 ODE Ha ~7 (000g HOD, Ori, wel bS.OUd B200 HOS" Aka Hao Veg 430 . 8. Commercial concentrated hydrochloric acid is 38.00 percent HCi by mass with a solution density of 1.1886 g em at 20°C, Whatis WS60ME 1004 =7 BE.00 g ech, GI00 g Hy Wunee> a) the mole fraction ° Hcl? Wiree A¥S.o013G,4uG04 [0.2324] > & Heoq Meee ee Maaa — 98.00[26.4009 + Ga.00] IS. ote b) the molality of HCI? " (16.81 mj Aue BE00 gu (ptm WEL WOO Mine” Teg -& Nese 460q git 6) the molavity of HCY “VBR ~ \i90, ©0~ BB,0/\ SE 4600 g HEL, Vea, [12.39 M] ee, ag.o trad Bee. 1.1896 @ got'n\/ 000 em roe Tos ~ SS SB ws MeV esdn " \So9.009 svn ABE. Hb0G giKCLT Tem SU Th