AH Changes sign when a Click on the process is reversed displayed. The reaction that was on the screen when you started and its derivative demonstrate that the reaction enthalpy, AH, changes sign when a process is reversed. button within the activity and analyze the relationship between the two reactions that are Consider the reaction B(s) + ¿O2(g)→B2O3(s), AH = 1270kJ What will AH be for the reaction if it is reversed? Express your answer with appropriate units.

AH Changes sign when a Click on the process is reversed displayed. The reaction that was on the screen when you started and its derivative demonstrate that the reaction enthalpy, AH, changes sign when a process is reversed. button within the activity and analyze the relationship between the two reactions that are Consider the reaction B(s) + ¿O2(g)→B2O3(s), AH = 1270kJ What will AH be for the reaction if it is reversed? Express your answer with appropriate units.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter18: Electrochemistry

Section: Chapter Questions

Problem 9RQ: What characterizes an electrolytic cell? What is an ampere? When the current applied to an...

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What characterizes an electrolytic cell? What is an ampere? When the current applied to an electrolytic cell is multiplied by the time in seconds, what quantity is determined? How is this quantity converted to moles of electrons required? How are moles of electrons required converted to moles of metal plated out? What does plating mean? How do you predict the cathode and the anode half-reactions in an electrolytic cell? Why is the electrolysis of molten salts much easier to predict in terms of what occurs at the anode and cathode than the electrolysis of aqueous dissolved salts? What is overvoltage?
Table 17-1 lists common half-reactions along with the standard reduction potential associated with each half-reaction. These standard reduction potentials are all relative to some standard. What is the standard (zero point)? lf is positive for a half-reaction, what does it mean? If is negative for a half-reaction, what does it mean? Which species in Table 17-1 is most easily reduced? Least easily reduced? The reverse of the half-reactions in Table 17-1 are the oxidation half-reactions. How are standard oxidation potentials determined? In Table 17-1, which species is the best reducing agent? The worst reducing agent? To determine the standard cell potential for a redox reaction, the standard reduction potential is added to the standard oxidation potential. What must be true about this sum if the cell is to be spontaneous (produce a galvanic cell)? Standard reduction and oxidation potentials are intensive. What does this mean? Summarize how line notation is used to describe galvanic cells.
When jump-starting a car with a dead battery, the ground jumper should be attached to a remote part of the engine block. Why?
For all of the following experiments, under standard conditions, which species could be spontaneously produced? (a) A lead wire is placed in a solution containing Cu2+ No reaction. YES or NO Cu. YES or NO PbO2. YES or NO (b) Crystals of I2 are added to a solution of NaCl. No reaction. YES or NO I^-. YES or NO Na. YES or NO (c) Cl2 gas is bubbled into a solution of NaI. Cl^-. YES or NO No reaction. YES or NO Na. YES or NO
R = 8.314 mol·K F = 96,485 mol AG° + RT · In(Q) AE° () · In(Q) AG ΔΕ %3D Half Reaction (Note: All given as reduction) E° (V) 02 (g) + 4 H*(aq) + 4 e → 2 H20 (I0) 1.229 Z2 (s) + 2 e - → 2Z (aq) 0.426 (aq) + 3 e A (s) 0.292 2 H20 (1) + 2 e G2+ (aq) + 2 e M2+ (aq) + 2 e Н2 (в) + 2 ОН" (aq) - 0.828 G (s) - 1.245 M (s) - 1.893 Using a U-tube, a student sets up a non-spontaneous electrochemical cell with a battery connected to two carbon electrodes that are submerged in 1 M MZ2 (aq) solution (M is a metal and Z is an anion composed of the newly discovered element Z). Use the reference information given in the table above to answer the following three questions. Question 10 Oxidation will occur at the while reduction will occur at the Possible answers are "anode" and "cathode".
R = 8.314 mol·K F = 96, 485 moi AG = AG° + RT · In(Q) ΔΕΔΕ-().In(Q) RT Half Reaction (Note: All given as reduction) E° (V) 02 (g) + 4 H*(aq) + 4 e 2 H20 (1) 1.229 - Z2 (s) + 2 e 3+ (aq) + 3 e 2Z (aq) 0.426 → A (s) 0.292 2 H20 (1) + 2 e G2+ (aq) + 2 e H2 (g) + 2 OH (aq) - 0.828 G (s) - 1.245 > M2+ (aq) + 2 e M (s) - 1.893 A student constructs a voltaic electrochemical cell with two metal electrodes [metal G and metal A] in their respective aqueous nitrate solutions [G(NO3)2 and A(NO3)3]. Use this information, as well as the reduction potentials in the table above to complete each statement below. Consider the same cell from the above prompt. If the A 3+ (aq) solution is diluted to 0.100 M and the G<* (aq) solution is diluted to 2+ 0.500 M, what is the initial value of Q under these new conditions? Report your answer with the correct significant figures.
R = 8.314 mol-K F = 96,485 mol AG = AG° + RT · In(Q) ΔΕ - (E) · In(Q) ΔΕ. Half Reaction (Note: All given as reduction) E° (V) 02 (g) + 4 H*(aq) + 4 e 2 H20 (1) 1.229 Z2 (s) + 2 e 3+ (aq) + 3 e 2z (aq) 0.426 A (s) 0.292 2 H20 (1) + 2 e G2+ (aq) + 2 e M²+ (aq) + 2 e¯ H2 (g) + 2 OH¯ (aq) - 0.828 G (s) - 1.245 M (s) - 1.893 A student constructs a voltaic electrochemical cell with two metal electrodes [metal G and metal A] in their respective aqueous nitrate solutions [G(NO3)2 and A(NO3)3]. Use this information, as well as the reduction potentials in the table above to complete each statement below. Consider the same cell from the above prompt. Calculate A E°. cell for this galvanic cell given the reference information given at the top of the quiz. Report your answer with 3 decimal places. You do not need to report units with your answer.
R = 8.314 mol·K F = 96,485 mot AG = AG° + RT · In(Q) ΔΕΔΕ-).In(O) Half Reaction (Note: All given as reduction) E° (V) 02 (g) + 4 H*(aq) + 4 e¯ → 2 H20 (1) 1.229 2 z" (aq) Z2 (s) + 2 e 3+ (aq) + 3 е 0.426 A (s) 0.292 2 H20 (1) + 2 e G2+ (aq) + 2 e H2 (g) + 2 OH (aq) - 0.828 G (s) - 1.245 > M2+ (aq) + 2 e - 1.893 → M (s) A student constructs a voltaic electrochemical cell with two metal electrodes [metal G and metal A] in their respective aqueous nitrate solutions [G(NO3)2 and A(NO3)3]. Use this information, as well as the reduction potentials in the table above to complete each statement below. Consider the same cell from the above prompt. Calculate AG° in kJ/mol for this galvanic cell. Report your answer with 4 significant figures. You do not need to report units with your answer. If your value is negative, make sure to include a "-" symbol.
Calculate Ecell in V at 25°C for the redox reaction indicated by the following line notation. Pt(s) | H: (1.5 atm) | H" (0.50M) || Ag* (2.0M) | Ag(s) 5 6 Half Reaction Ag* laa) s + Ag () +0.799 2H* (alt e H2 le) 7 8 +/- x 100 3. 2. 1, 4.
341203767 Be sure to amswer all parts. The AG° for the eaction is 2.60 klmol at 25°C. In one experiment, the initial pressures are PH, -431 atm P, -0.017 atm PHI =050 atm Calculate AG for the reaction and predict the direction of the not reaction. kmel O The net reaction proceds from left to right O The reaction preceeds from right to left
6-Consider the first ionization of sulfurous acid: H2SO3(aq) → H*(aq) + HSO3 (aq) Certain related thermodynamic data are provided below: H2SO3(aq) H* (aq) HSO3 (aq) ----- Hf kcal/mole -145.5 -151.9 S° cal/mole K 56 26 (a) Calculate the value of AG° at 25°C for the ionization reaction. (b) Calculate the value of K at 25°C for the ionization reaction. (c) Account for the signs of AS° and AH° for the ionization reaction in terms of the molecules and ions present.
Type your answer... 4points Consider the equation: 2A+3B--> 2C AG° (A) = 53.11 kJ/mol AG° (B) = -205.80 kJ/mol %3D AG° (C) = 77.16kJ/mol Calcualte AG° for this reaction at 298K in kJ. Report your answer with 2 places past the decin Type your answer.. Initial Rates nz data: