q1 ans - CHEM 0970 (KOGUT) QUIZ 1 SPRING - 2007 MONDAY...

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Unformatted text preview: CHEM 0970 (KOGUT) QUIZ 1 SPRING - 2007 MONDAY 1/22/07 1 PM — 214 CHEVRON 61W: V e 3% R NAME SCORE Points for each section will total 11 pts. 1. (4 pts.) For areaction 2 Ag} + B(g) —> AzB(g), AH“ is -60.0 k] at 25.0“ C. a) Can this system do work? Mo _ m Mm”. Amq Lamps/mac cm L’l" . b) How many k] of work are involved with this system when 1 mol A13 forms at 25.0 C? Mama/7.2 c7 )Mwflw. 142241“ 4012/ w: ~2{&3:{+_3: N2.qu posn‘wc A 3.] ,_, ~ My“; m km (3 '62” 3'49553 :: ewes—U 2. (3 pts.) Which of the following is/are reactions whose enthalpies are enthalpies of . w formation? 126“ a) chug, +2146) —» 2 KCl(s) m/D . W 13) Hzozm —’ H2tg) + 02m M C) 1/2 N2(g) + 3/2. Hzg) —’ NH3{g) AW ‘1) cm + 02m = (302(3) p.32 6) 3/2 01(3) ~* 03(g) Agfig WM; 3. (4 pts.) Suppose AH° for AzBug) —> %) + 2 Ba) is +70 k}. What is the AH° for AzB(g) + 3(3) —’ A2132(g)? - MW r-w—rz Cid-‘3' 1*» z/U’a'fio” fl”. ' Mwfimgdfi A 52%) AH: ~7bi4) add A2319: *‘7 Wkgyflk’ AK: 1%0'0/5) Agate; ~IOK) #28”) 4— gig) CHEM 0970 (KOGUT) QUIZ 1 SPRING - 2007 MONDAY 1/22/07 6 PM - 217 EBERLY NAME SCORE Points for each section will total 11 pts. 1. (6 pts.) Suppose 0.10 mol KOHM) is mixed with 0‘ 10 mol HClm} in a calorimeter at constant pressure. The original solutions are each 200 mL and have an initial temperature of 23.200 C. Alter mixing the temperature of the mixture is 33.20° C. Assume the densities of the solutions and the mixture are 1.OOg/cm3. Assume the specific heat of the mixture and the original solutionsGAJS Joule g' '1. What is the value of AH0 ink] per mol for KOHWU + HCl(aq_) —> H20“) + KClml)? U Roy 4 NC? .1) KCE’H-Jgfi M Wfimrfi? 7* Madgx AT X SH Jywmfir : 9005, x 10.0%: 4-193? :: [£17207 1' léjZKJ “Mil :— 14,7er Cw [flan-«K fl 2. [3125.) For C(s) + 1/2 02(g) —* (30(5) AHD = FOI' (3(5) + 02(g) —' COM) AHO = -393.5 k] AHO f0T2 C0749 —’ 2 COW) "l‘ 02(3). Alla M F; Fay Mm! dew-Flax .2ch 2 (q, +2044; + 7f7.a @2MAW MWWZWK'IM 4572— 2 £0 JQZ CHEM 0970 (KOGUT) QUIZ 1 SPRING - 2007 THURSDAY 1/25/07 8 AM — 301 CHEVRON NAME SCORE Points for each section will total 11 pts. 1. (6 pts.) Use the enthalpies of formation in the table below to calculate AH" for the reaction C3H8{gl + 502m —' 3 C0203) + 4H20(g) 2. (5 pts.) Compute the amount of work in k] at 25.00 associated with the conversion of 3/2 mol of 02 into one mol of 03. Does this reaction do work or is work done on the reaction? % Olwf'a 03(1) maan MWL ‘ ( dam muf- LL92 [An/Illale 1pm] = /z w z leuzwq 293% MJIE‘ JZEFL/ :1“?!ij (A); \"N CHEM 0970 (KOGUT) QUIZ 1 SPRING - 2007 FRIDAY 1/26/07 1 PM - 30] CHEVRON NAME SCORE Points for each section will total 11 pts. 1. (3 pts.) Write any chemical reaction for which the enthalpy of reaction is also an enthalpy off ti n. ‘ ma 0 Cm 1‘ ’40ng —6 Cog) NiCs) ’t‘ 5492.69) ‘17 Mil/QC!) H.159 + £0115; b9 / MVpCaMPMJM‘DQ/fpmwj 2. (8 pts.) Use the table below to compute AH° for the reaction at 25.0° C. r eff; 4NH3tg) + 5 02(3) “" 4N02(g) + 6 H20(g) Agog/.01) (MW; Alf: flew; )+ my; ) HE/ Afiémgfl '“HS? “Ht/9) ’fD 2’ 2' ~ 1‘" 33d A1045) 3 4-211”) +4f33d) —' (ll (4+9?) zit-flag _ 2m, #20191 49921-513 +~ 193%, 2 —~ 1/34. 3 1:) Also, compute AB“ for this reaction at 25.0a C. ) 0%ng fldfiq” AE: AI-l+)A“lR-r kayak/p.914, : ~}}?H.¥+]lj.€{3:4fl{293) Mfaw 1m%, \11/ l 3 flflmgfizg mama/Ml : "137,310 ...
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This note was uploaded on 04/15/2008 for the course CHEM 0970 taught by Professor Kogut during the Spring '08 term at Pittsburgh.

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q1 ans - CHEM 0970 (KOGUT) QUIZ 1 SPRING - 2007 MONDAY...

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