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For the following balanced net redox reaction, the Eºcell is 1.04 V and n = 2. Sn2+(aq) + Mn (s) —+Sn(s) + Mn2+(aq) Calculate the cell potential at 25°C when [Sn2+) = 1.97 M and [Mn2+1 = 1.73 x 10-2 M. 0.900 V 1.04V 0.980 V 1.10 V
The standard cell potential (Eºcell) of the reaction below is -0.55 V. The value of AGº for the reaction is _ J/mol. 12 (s) + 2Br (aq) → 21+ (aq) + Brz (1) Select one: O a. 0.54 O b. 0.55 c. 5.5 x 10-6 O O d. 1.1 x 105 o e. none of the above The structure of 2,3-dimethylheptane is CH; Select one: CHCHZ O a. CH2 - CH2 - CH2 - CH2 H3C CH3 b. CHÚCH-C-CH-CH3 CH3...
Consider the following reaction: 2N2O5(g) 4NO2(g) + O2(g) If AH°xn = 110 kJ mol-1 and AS°,n = 454 J-K-1-mol-1 at 298 K, calculate the value of the equilibrium constant Kp for the reaction at 298 K. A. 7.63 x 10-7 B 660 C. 54 D. 2.74 x 104 10 E Consider the following reaction: 2N2O5(g) 4NO2(g) + O2(g) If AH°xn = 110 kJ mol-1 and AS°,n = 454 J-K-1-mol-1 at 298 K, calculate the value of the equilibrium constant Kp...
53-54 53) The standard cell potential (E®cell) of the reaction below is -0.55 V. The value of AGº for the reaction is J/mol. 12 (s) + 2Br- (aq) → 21- (aq) + Br2 (1) A) 0.55 B) 5.5 x 10-6 C) 1.1 x 105 D) 0.54 E) none of the above 54) The standard cell potential (Eºcell) of the reaction below is +1.34 V. The value of AGº for the reaction is kJ/mol 3 Cu (s) + 2 MnO4- (aq)...
4. Which of the following is consistent with a spontaneous endothermic reaction? (A) AH> 0, AS <0, AG <0 (D) AH<0, AS > 0, AG>O (B) AH > 0, AS > 0, AG <0 (E) AH>0, AS <0, AG>0 (C) AH<0, AS <0, AG<0 5. For the reaction H, (g) +S (8) HS (g), AF- -20.2 kJ/mol and AS = +43.1 J/K mol. Which of these statements is true? (A) The reaction is only spontaneous at low temperatures. (B) The...
E°cell for the reaction shown below is calculated as 0.93 V. Use this information to calculate ΔG° in joules for the cell and to determine the spontaneity of the overall reaction. Make sure you enter the correct sign for ΔG° and give the answer to 2 significant digits. (F = 9.65 × 104 J/V ⋅ mol e−). deltaG = -nFEcell Overall Reaction: Pb( s) + 2Ag +(aq) → Pb 2+(aq) + 2Ag(s) E°cell = 0.93 V 9.0 x 104 J...
Question 19 (1 point) What is AG°273 of the reaction 12(s) + Br"(aq) -- 21" (aq) + Br2() at 0°C? Br2 (1) + 2e - 2Br (aq) E half = 1.07 V 12 (s) + 2e - 21 (aq) E half = 0.53 V -1.0 * 105 J/mol 1.0 * 105 J/mol 5.0 x 104 J/mol 0.5.0 × 104 /mol
5. (opts total) a. For a certain reaction, AH = 142 kJ/mol and AS = - 30.5 J/mol K at 25°C. Calculate the value of AGº for this reaction. Ans: AGº = A different reaction has AH = -106 kJ/mol and AS°= 94.3 J/mol K at 250 Call Ans: AGº = c. Will the reaction in Sa be spontaneous? How can you tell? Will the reaction in 5b be spontaneous? How can you tell?
Problem of the Day 18 1. (10 pts) Consider the following reaction: Br HBO a. Estimate AH for this reaction (use table 6.1 in your textbook) b. Is AS for this reaction positive or negative? Explain. C. Determine if AG is positive or negative. d. Is the sign of AG (positive or negative) dependent on temperature? Why? TABLE 6.1 BOND DISSOCIATION ENERGIES (AH) OF COMMON BONDS KJ/MOL KCAL/MOL KI/MOL KCAUMO Bonds to H H2C=CH-CH3 HC=C-CH3 KJ/MOL KCAL/MOL 385 92 489...
Problem of the Day 18 1. (10 pts) Consider the following reaction: TO + HBr a. Estimate AH for this reaction (use table 6.1 in your textbook) b. Is AS for this reaction positive or negative? Explain. C. Determine if AG is positive or negative. d. Is the sign of AG (positive or negative) dependent on temperature? Why? TABLE 6.1 BOND DISSOCIATION ENERGIES (AH) OF COMMON BONDS KJ/MOL KCAL/MOL KI/MOL KCAUMO Bonds to H H2C=CH-CH3 HCC-CH3 KJ/MOL KCAL/MOL 385 92...