Practice Problems 8 KEY

Practice Problems 8 KEY - A“ 4H}, if f at; CHEMISTRY 1414...

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Unformatted text preview: A“ 4H}, if f at; CHEMISTRY 1414 WE Spring 2011 ‘ ““ (“WT $an ) M Practice Problem Set 8 f MM ANY/AM \1 Question 1 A gas absorbs 126 k] of heat and is compressed from an initial volume of 122 L to a final volume of 58.2 L at a constant external pressure of 775 torr. Calculate AE for this process. AEIUW (1: +11!» M [Pox-Me B/L MM is Ammo) wwmv Av: €5.1L-IULI ~(HL wz ~77§m>¢ ~éHL : +Lt.0lé¥IO”NML + 5;; Low j((3 NM w: “3 “M W”): 64111 : éenu IL-km ' AF? Iltkj + Mum : |92 aT. Question2 \‘ Consider the following reaction: “was V“ “‘W’ PM “We RAMA Arm/MW. /XCF4 (s) + F2 (g) 9 XCF6 (g) j/ o ‘ K Wu; (1,0 k-m\ lim 5 (pow Imam?) Calculate ASuniverse for this reaction if the reaction occurs at 255 °C. 2' S 175 k Ajymwflmi mg :4 :10 MW] ~ [1N m” x IWLj/um. L MI F11 1039/M..] 1 - 7.10! 1‘M AHermt CIA/‘0‘ KtFLX ~L‘71‘ib‘7/Mvij‘E'Moix‘F“ x -LSMj/M" F "Ain‘t $03 : - Llng . - 3 + l 3’k Agra 1 " A “Flfi'ww ‘ ” ('thl) 43%,“, ‘ - LLO‘ /“ 2) “k —\ - M:D.O$Ikl/ :__Hbj/ Question3 T 91% k : 7), mA k ~ K The booster rockets of the space shuttle use a mixture of aluminum and ammonium perchlorate as fuel. The reaction is: 3A1 (s) + 3NH4ClO4(S) 9 A1203(s) + AlCl3(s) + 3NO(g) + 6H20 (g) Calculate AH° for this reaction. (him, -. \M.‘ “103% _,L7La>/M + Mu MHMJ-fioqwm + gMoifl/OfiqOL‘j/m‘ + Cma' Miami -L‘11L\3IMJ - [3mm AI #0 + 2mm when)” ~2/"‘§"‘7/MJ : ‘ M77 U 3§gk Question 4 ’ l/ M fo we Calculate AG° for the following reaction which occurs at 85 °C: A by: AH ~ T4 5 6 e we (C02 (9 +LH20(1) 9 C5H1206(s) +£02(g) ’21—[WLQ 4’ 1‘9,“ (OW-Wm ff ST’edFIQJ “Um Clmu CLHQDL K “NWT/N. + 6m 01x0] ~C6Mol(01* 4%; + (’M“ HLOQ)X'—L%ékj/MI_J = 3.3010 ‘3 Aw : Cw Linnea uflxw + w 011 zosvmmum w m aw +6muihmni7obumj:-1iijn.2—0J11MMK .Anz:lfiolkS-[3§3k¥-OLL1“VA)t Z$qékj I140] rromwvuu; (I {r WW” I“ SEW“ n“ N’H’Nou I; Question 5 . A fl—EUWQ 6/: (OM/gum\w 1 Calculate the standard heat of formatlon AH°f for PbO (3) given the following 6 information: 8+ W W. t/ PbOm + 00(3) -> Pb“) + COM) AHnm=-131.4kJ -. Elm-11’on + I/vm LOLS‘ ‘3q3.§ [AD/Moi] — [ 1M0, l’éOxALH‘fU’to) + (not L01 -ll0.5"‘3/A.,] - thhjt ~3iimq-—Umuno~w}mw)+uw§ui 4H4“: - BMW; — )Moil’LOXAH°p[I’£o) 1 ISL“; :3 JprpULbl "film/Ms) Question 6 For the following reaction taking place at 104.0 °C, Aern = - 74.9 J/K and Assurroundings = — 335.2 J/K: C120 (g) + 3/2 02 (g) ‘9 2 C102 (g) Calculate AG,“ at 104.0 °c. 2 377.1 k AYWAVZ‘QSmsl43ka:-‘7qfl3fl4+ ~93;1TVk: ~HWJ3VK asvw‘ VAN 2) Air: ~45m:v n T A0: —[~wo.|%>< 3711M = l-S‘flwoyj : RIVA] V f Question 7 Determine the equilibrium constant K for a general reaction A + B -) C + D if the value of AHrxn is - 287 kJ and Aern is + 388 J/K. The stoichiometric coefficients of all species involved in this reaction are one. ‘7 49m,“ T t L g b g -. 53% K Agufl14HmV~TAgw2 ~137k3~(lfl%ux3381ml ‘ ~1171J— IILI/tj : -‘103k3 Air:‘/Ll'lf’k = “WSHD’T r . ‘ Ll'ogx‘D I : ‘ $.g‘Hj/umm. X l/‘lk k1 I vl u. l’“ LL QINK= a‘ =3 K‘ll‘lmo“ Question8 Calculate ASrxn and AGnm for the reaction P4010(s) +LH20(1) 9L[H31304(aq) NC“ +° Bill/WK 457%, 2 C mm Hilaot1 (mx [g3 if/u] ~ E lmlfluohx 7,2,0} 31/14 + Anti/lloufi7o3/k) : "7 j/k ' ' alrwi C‘lml Hsl’oqw\$ ~ll‘13kj/lw‘] ‘ CI/V‘ol P10“) x Mjlmq 4» 6M“ “LDWX ~23? (CS/MM] ‘; '43 ...
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Practice Problems 8 KEY - A“ 4H}, if f at; CHEMISTRY 1414...

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