55. Which one of the following is not a valid expression for the rate of the...
53. The third law of thermodynamics states: A) Any irreversible process results in an increase in total entropy, whereas any reversible process results in no overall change in entropy. B) The entropy of a pure crystalline substance at absolute zero is zero. C) Energy is conserved. D) If AG = 0, the reaction is at equilibrium. E) None of the answers are correct 54. Which one of the following is always positive when a spontaneous process occurs? A) AS B)...
48. When we look at the relationship between AGº and K and the data in Table 19.5, what information can be extracted from the data? Page 9 TABLE 19.5 Relationship between AG and K at 298 K AG", kJ/mol K +200 9.1 x 10 +100 30 X 10-19 17 x 10 +10 18 x 10-2 67 x 10 0 1.0 15 -10 56 x 10 5.8 x 10 -100 3.3 x 107 -200 1.1 X 10 -10 A) When AG®...
Which one of the following is not a valid expression for the rate of the reaction below? 4NH3 + 702 – 4NO2 + 6H20 A). A[02] B) 1 A[NO21 아 이 D) - AINH31 E) All of the above are valid expressions of the reaction rate. prt sc
5. Which of the following would decrease the K for PbCl2? 2. Lower the pH of the solution b. Add a solution of Pb(NO3)2 c. Add a solution of KCI d. Both band e. None of the above the Ky of a compound is constant at constant tempera mperature, 6. In which of the following aqueous solutions would you expect AgBr to have the HIGHES solubility? a. 0.10 M LIBE b. 0.10 M AgNO3 c. 0.20 M NaBr d. 0.15...
CHEM 106 Chemical Equilibrium, Acids and Bases 1. Which expression correctly describes the equilibrium constant for the following reaction? 4NH,(g)+ SO,(g) 4NO(g)+ 6H2O) K. LNO"CHO B) K-(4INOj+ 6HO1) (4NH,]+ S10))CAT6 ) K-(INOl,0])INH,O,l) D K-(INOjHO)/(IINH iol) E) K-(NHJTO) /INO)THO ANS: D 2. Determine the equilibrium constant for the system N;Oa 2NO; at 25 C. The concentrations are shown here: [N;O ]-2.32 x 10 A) 0.608 B) 1.65 C) 1.17 x 10 D) 0.369 E) 8.57 x 10 M, [NO 2]-1.41 x...
Test IV (Electrochemistry) 2018 Fall What is the oxidation number for the Which of the following is true concerning a galvanic cell? (A) Oxidation occurs at the anode and is 1. 8. underlined manganese in Mn04 (A)-8 (8)-2 (C)-1 (D)4 (E) 7 where anions move towards where anions move towards where cations move towards where anions move towards where anions move towards 2. When balancing the below half-reaction in acidic solutionelectrons are added to the (B) Oxidation occurs at the...
number 9 please MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answen the sers the question. 6) A particular 12V battery is bas battery is based on a reaction having a standard cell potential, E 1.92 V. What happens when the battery "dies? A) E° - 12 V and E = 12 V B) E = +1.88 V and E= 12 V C) E = +1.88 V and E=OV D) E-12 V and E-OV ) 1)...
4. Which of the following statements about the voltaic cell shown below is correct? Zn(s)[Zn** (aq)|| Cu** (aq)|Cu(s) (a) The oxidation half-reaction is clearly Zn(s) ® Zn** (aq) + 2 e. (b) The oxidation half-reaction is clearly Zn() Zn" (aq) +le. (C) The oxidation half-reaction could not be anything other than Cu(s) ® Cu (aq) +2 e. (d) It is obvious that the oxidation half-reaction is Zn(s) ® Cu(s). 5. Which of the following statements about the voltaic cell shown...
a) 4.9 x 10'M b)24x10 M c)5.8x 1010 M )1.2 x 10 M 19. Which one of the following compounds will have the lowest molar solubility in pur water? b) CuS, Ksp 1.27x103 d) ZnS, Ksp = 1.6 x 10-24 a) PbS, Ksp 9.04 x 102 e) Al(OH)s, Ksp 3 x 1034 What is the molar solubility, i.e. [Fe , in a saturated aqueous solution of 20. Fe(OH)20) Fe(OH(s)Fe2+(aa) + 201H (ag), Ksp 4.87 x 101" a) 2.44 x 1017...
E) write the cell reaction F) calcúlate the cell voltage 8. The Kip of Ca(OH) is 6.5x10 What is the pH of this saturated solution? 9. A voltaic cell is constructed with two electrodes: Ag" (0.100M) I Ag, Eore.-0.799 v. Fe2+ (0.300 M) I Fe, E%.--0.409 v Which electrode is anode? and a) b) Which electrode is (+) electrode? c) Do electrons flow from Fe to Ag or from Ag to Fe? d) Do Ag' ions migrate through the solutions...