# q4 ans - CHEM 0970 (KOGUT) QUIZ 4 SPRING - 2008 MONDAY 2/ 1...

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Unformatted text preview: CHEM 0970 (KOGUT) QUIZ 4 SPRING - 2008 MONDAY 2/ 1 1/08 1 PM - 214 CHEVRON NAME SCORE Points for each section will total 10 pts. 1. (6 pts.) For NH4HS® = NHgtg) + Hlstg], it is found when solid NH4HS is added to an empty 2.00 liter vessel. The gas pressure rises to an equilibrium value of 0.500 atm at 25.0“ C. Compute KP. ‘3 Pﬁrrabgjﬁaum = No.51” H15} RP: PW. R15 zgmﬂas‘d: awzs’ 30TH ARE .. 2513/17?“ 2. (2 pts.) Using your Kc value for the equilibrium above, compute KC at 25.0“ C. Kp = KC (RT)A". I AM k? 2 Kg (21“) M -= z 2 H : , - KC 2. 0 0625 ,1, [my/0 ‘r (QT) 2‘ 60ng 2%”) 3. (2 pts.) Suppose the system in #1 is at equilibrium. It is endothermic. If the temperature is increased, how will the equilibrium constant change? @ b) decrease e) no change CHEM 0960 (KOGUT) QUIZ 4 FALL— 2006 MONDAY 2111/03 6 PM - 306 CHEVRON NAME SCORE Points for each section will total 10 pts. 1. (4 pts.) For 2 NH3(g) _—_- N235) + 3 H205}, suppose .100 mol NH; is added to a 2.00 liter vessel. Fill in the ICE table below. 2. (4 pts.) The equilibrium in question #1 is endothermic. Predict the direction in which the equilibrium will shift if the following changes are made. a Increase the tem erature. ' ) F We {Mg/[7'3 1)) Increase the volume of the system. WWW 3. (2 pts.) Kc : 100 for Ala} + Bag) ﬂ 2AB(g) at 227° J —. AM 134.. I a) What is K? KP ‘ KCCE T) M mo Mpzkc :: 1&9 b) What is K: for 1/2 Aug) + -l/2 Egg) = ABQ)? / 5a: Big] , mag 15 B733 [Am/L kéjr/O CHEM 0970 (KOGUT) QUIZ 4 SPRING - 2008 THURSDAY 2/ 14/08 8 AM - 217 CHEVRON NAME SCORE Points for each section will total 11 pts. 1. (6 pts.) For the equilibriumZNOtg) + 02(3) = 2N02[g), KC : 1.40 x 10‘6. Compute the equilibrium concentration of N02 if .020 mol NO and .010 mol 0; are introduced into anemptyl.00Lvessel. I ‘_[D_‘ [N037— Ciylz __ ‘ I m 1 ".1. m" CW“ Egﬁfc L“ 0 [NO] [09 gW—«j 0 .. 07.0 “2X JOEO" _ 1.. __ 7- N ._ x (mom)? MAW IH’aUO (do) ‘ Liv . . -i '2— NOL 29-10 +2.1 @N 5,13%“) " = L15! K ha, y: 37yro"é’ 74am 2. (2 pts.) Suppose the equilibrium system in question #1 were compressed to a smaller volume. In which direction would the equilibrium shift? Wotqu C, 3. (2 pts.) Compute KP using the Kc given in question #1 and using 250% (Kp = KARE“) a k? : 1/1021“) ' #é - “47: W: Ema/0 y fairway??? DO 00+ SJarﬁ’ do; 7753;21ch CHEM 0970 (KOGUT) QUIZ 4 SPRING - 2008 l + " FRIDAY 2/15/08 1 PM - 301 CHEVRON NAME SCORE % oints for each section will total 10 pts. 1. (7 pts.) Suppose Kc for 2 ABm + C2(g) = Ang) + BZCG) is 4.0 X 106. What are the equilibrium concentrations of all components if .0100 mol AZC, .0100 mol 32C, 1.00 mol AB, and .500 mol C2 are added to a 1.00 liter vessel? 6?: {526331293 im (an Came 55,4wa LING-f 501.039,”) [A arm] j: 10;; If; (Lawszin a S gaqwjfmjd AB LEO 42x ’gfotf: 9c M; 9906‘, mm) L 92 '5’” 4” ‘ 5? = 2:00 x10””>>“t:0 Ho" 2. (3 pts.) Predict the direction of shift for the exothermic equilibrium 3 5(5) + 2 03(g) :- 3 802m) if the changes below are made when the system is at equilibrium. 611* W b) Add 3(5). M W :1) Increase T. c) Reduce the volume of the system. WW ...
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## This note was uploaded on 04/07/2008 for the course CHEM 0970 taught by Professor Kogut during the Spring '08 term at Pittsburgh.

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q4 ans - CHEM 0970 (KOGUT) QUIZ 4 SPRING - 2008 MONDAY 2/ 1...

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