C14HW9a_3 - 12/18/11 View Attempt Vie T Attempt 3 of...

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Unformatted text preview: 12/18/11 View Attempt Vie T Attempt 3 of unlimited : S C 14HW9a : N S N : T : 1, 2011 10:01 PM 1, 2011 10:26 PM 00:24:28 Total score: 9/10 = 90% T 0.0 M : 10 Done 1. W T RUE? Student Response C orrect Ans er A. T . B. T . C. E . D. T , . S : 1/1 2. A Student Response A. C orrect Ans er . B. . C. . D. . E. . S : 1/1 3. T .A , ? A B + C K = 150 learn.uh.edu/webct/urw/ /ViewStudentAttempt.dowebct?attempt=4980450 1/5 12/18/11 View Attempt Student Response C orrect Ans er A. T he rat e c onst ant s f or t his reac t ion c annot be det ermined based on t he equilibrium c onst ant . B. T he rat e c onst ant f or t he f orward reac t ion is smaller t han t hat f or t he reverse reac t ion. C. T he rat e c onst ant s f or t he f orward and reverse reac t ions are ident ic al at equilibrium. D. T he rat e c onst ant f or t he f orward reac t ion is 150 t imes great er t han t hat f or t he reverse reac t ion. E. T he rat e c onst ant f or t he reverse reac t ion is 150 t imes great er t han t hat f or t he f orward reac t ion. Sc ore: 0/1 4. At equilibrium in t he f ollowing reac t ion at 319 K, t he c onc ent rat ion of NO2 (g) is 2.09 M. What is t he c onc ent rat ion of N2O4 (g) if t he equilbrium c onst ant f or t his reac t ion is det ermined t o be 39.68 at 319K? 2 NO2 (g) N2O4 (g) Student Response C orrect Ans er A. 82.9 B. 19.0 C. 173 D. 362 E. 0.110 Sc ore: 1/1 5. A mixt ure is prepared wit h [CO] = 0.035, [Cl2] = 0.015, and [COCl2] = 0.95. It is known t hat Kc f or t he equilibrium CO (g) + Cl2 (g) COCl2 (g) is 1.2 103 at 400°C. Predic t what , if anyt hing, will happen. Student Response C orrect Ans er A. T he reac t ion is at equilibrium so no net reac t ion oc c urs. B. T he reac t ion oc c urs in t he f orward direc t ion. C. T he reac t ion oc c urs in t he reverse direc t ion. D. It is impossible t o predic t wit hout more inf ormat ion. Sc ore: learn.uh.edu/webct/urw/ 1/1 /ViewStudentAttempt.dowebct?attempt=4980450 2/5 12/18/11 6. View Attempt Whic h of t hese best desc ribe t he direc t ion t he f ollowing reac t ion (in a 5.0 L f lask) will proc eed if more c alc ium oxide is added t o t he syst em? CaCO3 (s) CaO (s) + CO2 (g) Kp = 1.9 x 10 23 Student Response C orrect Ans er A. t o t he right B. t o t he lef t C. T he equilibrium posit ion will not shif t bec ause c alc ium oxide is a solid. D. T he equilibrium c onst ant get s smaller t o ref lec t t he added c alc ium oxide. E. More inf ormat ion is needed t o answer t his quest ion. Sc ore: 1/1 7. Whic h direc t ion will t he f ollowing reac t ion (in a 5.0 L f lask) proc eed if some c arbon dioxide is removed? CaCO3 (s) CaO (s) + CO2 (g) Kp = 1.9 x 10 23 Student Response C orrect Ans er A. t o t he right B. t o t he lef t C. T he equilibrium posit ion will not c hange bec ause t he ot her c omponent s are solids. D. T he equilibrium posit ion will not c hange bec ause t here is an exc ess of c alc ium c arbonat e. E. T he equilibrium posit ion will not c hange bec ause t he syst em is c losed. Sc ore: 1/1 8. At a given t emperat ure, Kp f or t he reac t ion below is 0.054. In a given experiment , 0.15 at m of eac h produc t and 0.25 at m of NOBr are int oduc ed int o a c ont ainer. In whic h direc t ion will t he reac t ion proc eed, or is it at equilibrium? 2 NOBr(g) <=> 2 NO(g) + Br2(g) Student Response learn.uh.edu/webct/urw/ /ViewStudentAttempt.dowebct?attempt=4980450 C orrect Ans er 3/5 12/18/11 View Attempt A. Reac t ion will go t o t he lef t B. Reac t ion will go t o t he right C. Reac t ion is an equilibrium Sc ore: 1/1 9. At a part ic ular t emperat ure, Kc = 54 f or t he reac t ion H2 (g) + I2 (g) 2 HI (g). If 1 mole of H2 and 1 mole of I2 are plac ed in a 5.0 L c ont ainer, what would be t he equilibrium c onc ent rat ion of HI? Student Response C orrect Ans er A. 0.16 B. 0.04 C. 0.32 D. 0.08 E. 0.20 Sc ore: 1/1 10. Consider t he f ollowing equilibrium: PCl3 (g) + Cl2 (g) PCl5 (g) Kc = 26 at 250 C 1.0 mol of PCl3, 1.0 mol of Cl2, and 5.0 mol of PCl5 are plac ed in a 10.0 L f lask at 250 C and allowed t o c ome t o equilibrium. What is t he c onc ent rat ion, in M, of Cl2 at equilibrium? Student Response C orrect Ans er A. 3.4 B. 0.19 C. 0.16 D. 0.13 E. 0.20 Sc ore: learn.uh.edu/webct/urw/ 1/1 /ViewStudentAttempt.dowebct?attempt=4980450 4/5 12/18/11 View Attempt D e learn.uh.edu/webct/urw/ /ViewStudentAttempt.dowebct?attempt=4980450 5/5 ...
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