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cee11-sp05-mt2-Kirchstetter-soln

cee11-sp05-mt2-Kirchstetter-soln - DEPARTMENT OF CIVIL AND...

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Unformatted text preview: DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING UNIVERSITY OF CALIFORNIA. BERKELEY E11. APRIL 13. 2005 MJD'I‘ERM EXAM 2 3 Name and Student ID: OLWI 0 N Instructions: Answer the questions that follow directly on these pages in the spaces provided. Use the back of the page if you need more room for your answer. If you believe there is insufficient information provided to answer a question completely, state reasonable assumptions and proceed from there. This exam is closed-bookfclosed-notes. Calculators are not allowed. Time: 50 minutes. Question: Score: Out of: l _ 5 2 _ 6 3 _ 4 4 __ 5 5 _ 3 BONUS _ TOTAL 23 Useful Data and Formulas: Atomic masses: H=1, c=12, N=14. 0:16. 3:32 g mol" Ideal gas law: PV = nRT Area of circle: mm Surface area of sphere: “ltd2 Volume of sphere: Inf/6 ”ll 2 l. ENERGY CONSUMPTION & AIR POLLUTION a) List six “criteria" air pollutants regulated by the EPA. (1 point) J C? — (carbon Momxfll ‘. 03 - OQDNL * 32*?“ 007 P — laud Puma»? N02: “9:10 In du'oxtcL— - mthV‘OnJW 1 l 301. ’g‘AY‘d‘ 4401"; m.- PQM‘AKR MW .... PfM’ at]; Won PM a." mic m7 b) In what order do the peak concentrations of nitrog n monoxide, nit gen dioxide and ozone occur on a typical weekday in Los Angeles? Explain your answer. (2 points) |.NO,1- NO; 13.03 - NO ‘1"; QMIHKJ :{W an“ (@m‘ywxnon) ’ No" a“) 03 avg smndwy non Po\\u’m“\-’r$- N01 :8 {and L7 “lint OXlJOk‘MRDH 0-? N0 . VOCS writ. :M?QO {or wk: NOANOL C-UndKY‘Sl‘On. N01 Pko'l'olj‘lls JHNKS 0'5 3“meth : P‘Oz‘d‘“ A “lo-*0. 'g PonfioL'sd ~1Mds wk okra“. NJLA‘ 0’ +fl01 "'1' 03 “no?! acombtlms v/ m‘mcxa‘nf 01x “ 0) State two reasons why there are two air quality standards 1’ particulate matter. (1 point) 11qu m ‘l’wb PM SWfiJflwls '- PMI‘S—I PM“) "E“?- (PM'xfi') WM! 4°~N$< (PMHD) Pun-hunts Raw. 4&ng END“ Mechanisms (igréflfgflm SOWQ'D and +le how: dMva-Lm ckzmim‘ COMPOiAI‘On and RWN’V‘K 411(ka ¢0n+(o\ swa-tzalxfi . . FIR PM P1n1WW$ WK 551$le I\¢\ fufhflofi SNIHQ-Yh Alva“ «on; 9M“: cl) Explain the difference between the 10 er and higher heating values of a hydrocarbon fuel. (1 point) .mthxw . t'n‘a climatic-ho. ‘ox‘twtfin “Ids: 'ch: I3 JVL ‘S-ta-WL of 1110 AA +1”: comb/shun ondvq'rfi ‘ ' MN is «\mlq'tzd fi$5vm1w€ “f‘nodt “191an coodxms “to “loLcrul/ musk Rhn‘éfis link \a’l-Q-Mr 2.09 0—? varor:=balr:oh o LHV - “X0 :3 DESSMKJ ‘l'o FEMfil‘V‘I I‘m +1.5: vqfw Pkofi,‘ 2. COMBUSTION STOICHIOMETRY 3) Write a balanced reaction for the stoichiometeric combustion of ethene (C2H4) in pure Qxygen. (1 point) Clnl‘ 'l' 301—. fl"? QCOJJl 191,0 b) Calculate the oxygenlfuel mass ratio for the above reaction (you can express your answer as a fraction with valid units explicitly shown). (1 point) 3le5 O}. limelx Cfl-lq . 3'23 0;. Clef) . ##5— F. lmlzczlla Magus m0; " 1‘6 filo/cit1 c) Calculate the gross heat of combustion (lemol) for ethene given the enthalpies of formation (kl/mol) for the following compounds: (2 points) C2H4 = 50, 02 = 0, C02 = 400, H200) = -300 k ._. may my), {aw Avail "$00 Ja'eoo - Sb '50 m/W‘ “fl H50 LT/m] 66:? {hall'catzs Kfifiinkrmic mm. (1) Calculate the carbon intensity, CI, of ethene (you can express your answer as a fraction with valid units explicitly shown). (2 points) Ci is “ll“ ms 91‘ CWLOH awn-R] Pszr MT EMT coma—TH Q1: lmksCO \LLC l13<_.w\olCzlJ~ ,lUOOLT Magus IKE-<03, mlc. HsoL'S w: Ci 2 IT? 3/“ 3. MOTOR VEHICLE EMISSIONS a) Sketch a graph of pollutant emissions versus ain’fuel mass ratio for CO, HC and NO. and indicate the parts of the plot that correspond to fuel rich, fuel lean, and stoichiometeric combustion. (2 points) N0 _ “3‘1- taxod‘) tail" (0).) - a N0 ’ ' HC;CO - AncowriL-kt £11 (DMLIWI‘OH \fij‘ COMLHW on 1.5;! b) In regards to combustion stoichiometry, explain how oxygenated gasoline reduces pollutant emissions from cars. (1 point) 011%w0’r1-J £3314:le Con-limits OmmeJm-J QGMPD-MJS (ta-3,9541%“, WEE).\J'M\\13 01767-ij await“ ails 07“,?“ ”m “livL embinz wilt/Rod mixture. . impropm” halal anbwg 4km rim “me\ nus ” Simil will [:55 H990 when was OmOOMOr’rQJ fiqmiih bzmvx 1:} file-rm 5M” link air/kl mix'lam- c) What have remote sensing measurements of vehicular pollutants indicated about the distribution of emissions among vehicles? (1 point) Th2. emisiims Jiiswri'Lv-bifln i5 Sim-wee]: "' 50% Oil PaliWon+3 (CO,HE,.NOI) mm awn-+2.4 [97 $406 o-i VK‘NQMLS . 4. CLIMATE CHANGE 21) Which greenhouse gas has the largest radiative forcing per unit mass, carbon dioxide. methane or nitrous oxide? (1 point) N10 - Mm»: oxide b) Explain two reasons why the radiative forcing of carbon dioxide is known with greater certainty than the radiative forcing of black carbon. (1 point) XOP'HAUA pioftfii‘is (inqhew “Vol WING“ “I SVHIJDLQ) “R Lei-WY known £0." C01 (Anal all bramhow’as 3%“) “AW“ BC (NJ I!“ GWosolS) 1. AMOjf-lvfl'i‘é «mantra-lure“ QYK SPQJ‘JQ‘L’ Q“J *RMFMIV mel‘OLlQ or EC 4w: an in door osmsflmg Ham (”v weak: in horosPLarfi CO]. mflwmfi'bm :3 ROME)? “K045 %VW&W-Af Mgrkzfi Jal bro long” ‘l£2+lx‘\& _ LN (gaming) _ 0) Ex 'n two ways in which sulfate erosols perturb the earth’s radiation balance with space. (1 point) |.D;masL7 L1 Kahuna?) ‘Svhlcslér Lore}: +o spam. 9.. racists, L1 stuns an and, all New at, 3,,th 05 (\OJA condansoJr-tm nut-‘21:. d) How do scientists reconstruct the historical record of atmospheric carbon dioxide and methane concentrations? (1 point) Drank-sis 0‘“ Unis Luella hawk; \‘h :GL Lori‘s. e) Write an expression for rate at which the earth absorbs solar energy (W) in terms of the earth’s albedo, ct, and diameter, d (m), and the solar constant, S (W m'z). (1 point) -ot 7‘31 S Q )T 5. WATER TREATMENT a) In drinking water treatment. what two processes precede the sedimentation basin to improve the particle collection efficiency in the basin? (1 point) COQ8AQV£OM - uJJili‘mfi as conamlmflr Ckmiéqk w/ nyft‘sl‘flfi Whitby $30qu \QW:by~. - 'BKWAE Mt‘uflh‘a 4'6 PtoM‘O‘iQ MED‘LI'fUWMflg'K cautsaons anal Sim ‘yurvwfitfirtfibh. b) Name three treatment options intended to control for pathogens in water? What treatment option offers protection against contamination in the water distribution system? (1 point) (N 03 (JANA?! QWW res:eimq\ Prefix-1': cm 0t 1‘1“? PQ‘i'LDaL'MS “(H-fl Men, con-t qm'thqk mm Wet-inf M "ARK WG‘VQOD Ak‘ifl‘Dv-‘rim Si‘ifio‘m . 0) Explain the purpose of primary and secondary standards in water treatment? (1 point) CL‘OrQMthK Pflkavq " Piot‘t'lfi‘oh fi-t heme“ Mama “ Muk‘i wtfizv Sara. +0 ANNA M ‘ S‘meLkQ akaflK—Rhi fink") 0!: 5 2] Q-‘fikfian (LAM i +06%; (1 £1“le 035;) 1 a a) C01“ ro‘swfixl 11“ tst‘nR‘S‘S BONUS QUESTIONS (0.5 point each) i) Write the third reaction in the primary photolytic cycle. MEMO-5 -~—> NOl J, 01 ii) Where did Dr. Chu conduct the research that led to his 1997 Nobel Prize in physics? Ball Lalo '5 iii) Do you plan to attend Monday’s (Optional) field trip to the landfill? (circle one, credit given for either answer) Yes No ...
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