Homework Answers
Delta G = delta H - T*delta S
Since delta G is increasing as temperature is increasing.
This means reaction would become non spontaneous at higher temperature.
This reaction is spontaneous at low temperature and non spontaneous at higher temperature
This is case 4 in above table
Answer: B
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8:09 • LIE Question 7 of 10 Submit Which of the following is true for a...
4. Which of the following is consistent with a spontaneous endothermic reaction? (A) AH> 0, AS...
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...
7. Use the following thermochemical data to identify which statement is true pertaining to the reaction...
7. Use the following thermochemical data to identify which statement is true pertaining to the reaction Fe,O,(s) + 3H2(g) à 2Fe(s) + 3H,O(g) AH(Feq (ə)) = -822 kJ mol AH(H0(9) --242 kJ mol 56.96 -0.090 kJ moi"! K S.= 0.131 kJ mollk! SPO = 0.027 kJ mol'k 54,00) -0.189 kJ mol-'k A The reaction is thermodynamically favourable at 20°C. B The standard enthalpy of the reaction is -96 kJ molt C The Gibbs energy change for the reaction at 500...
Question 16 of 45 Submit FeCl3 has a van't Hoff factor of 3.4. What is the...
Question 16 of 45 Submit FeCl3 has a van't Hoff factor of 3.4. What is the freezing point of an aqueous solution made with 1.71 m FeCl3? (Kf for water is 1.86 °C/m) °C 4 7 5 8 6 9 Question 20 of 45 Submit Determine AGº for the phase change CO2(g) → CO2(aq) at 25°C. AH° = -19.4 kJ/mol AS° = +92.3 J/mol-K kJ/mol (1 4 7 +/- 2 5 8 3 6 9 0 x 100 May 7...
Tutored Practice Problem 19.3.5 COUNTS TOWARDS GRADE Calculate temperature at which AGº changes sign. Close Calculate...
Tutored Practice Problem 19.3.5 COUNTS TOWARDS GRADE Calculate temperature at which AGº changes sign. Close Calculate the temperature (in kelvins) at which the sign of AGº changes from positive to negative for the reaction below. This corresponds to the temperature at which K<1 changes to K > 1. Assume that AH and AS are constant and do not change with temperature, Fe304(8) + 4H2(e) 3Fe(8) + 4H2O(g) AH° - 151 kJ/mol and AS - 169 J/K: mol Check & Submit...
IN ILLIULIOL JU_SUN/Lab%20Exams/CHEZ101%2... Submit Answer kJ/mol Tries 0/2 7. Consider the following reactions: A-B AH =...
IN ILLIULIOL JU_SUN/Lab%20Exams/CHEZ101%2... Submit Answer kJ/mol Tries 0/2 7. Consider the following reactions: A-B AH = 272 kJ C-B AH = 36 kJ What is AH for A C ? It is possible that your answer could be either positive or negative. If it is negative, you must include the "minus" sign. Enter your answer as a decimal number. k] Tries 0/2 Submit Answer 8. Consider the following reactions: A + 2B - C + D AH = -224 kJ...
8) HY 8) Consider a reaction that has a negative AH and a positive AS. Which...
8) HY 8) Consider a reaction that has a negative AH and a positive AS. Which of the following statements is true? A) This reaction will be spontaneous only at high temperatures. B) This reaction will be spontaneous at all temperatures C) This reaction will be nonspontaneous at all temperatures. D) This reaction will be nonspontaneous only at high temperatures. E) It is not possible to determine without more information 9) What is the volume of 5.60 g of O2...
Need help with #8 & 10. If they are correct will rate high. Thank you! 8....
Need help with #8 & 10. If they are
correct will rate high. Thank you!
8. The Haber process for the production of ammonia involves the equilibrium 2 NH3(g) → N2(g) + 3 H2(g) For this reaction, AH° = 92.38 kJ and AS = 198.3 J/K. Assume that AH° and AS° for this reaction do not change with temperature. (i) Predict the direction in which AG for the reaction changes with increasing temperature. (ii) Calculate AG at 25 °C and...
CHANGES IN ENTROPY OF UNIVERSE VS SYSTEM. Evaluating Spontaneity Considering both Entropy and Enthalpy 7. In...
CHANGES IN ENTROPY OF UNIVERSE VS SYSTEM. Evaluating Spontaneity Considering both Entropy and Enthalpy 7. In a spontaneous process, which of the following always increases? a. the entropy of the system b. the entropy of the surroundings c. the entropy of the universe d. the entropy of the system and the universe c. the entropy of the system, surroundings and the universe (Hand S refer to the system), a. AH>0 8. Processes are always spontaneous, regardless of temperature, when and...
in 19 The following reaction takes place at 120°C-H 0(1) - H 0(g) Which of the...
in 19 The following reaction takes place at 120°C-H 0(1) - H 0(g) Which of the following must be true? AH = 44.0 kJ mol AS = 0.119 kJ mol K ered ed out of Ein Select one: a. The reaction is spontaneous Flag question b. The reaction is not spontaneous CAG=0 d. AGO e. Two of these Finish attempt. Time left 3:13:19 e lp @ NI Wololol **** 2x Cy BN м.
At 25°C, the following heats of reaction are known: AH (kJ/mol 167.4 2CIF + 02 →Cl20...
At 25°C, the following heats of reaction are known: AH (kJ/mol 167.4 2CIF + 02 →Cl20 + F20 2ClF3 + 202 →Cl20+3F20 341.4 2F2 + 02 → 2F20 At the same temperature, calculate ΔH for the reaction: ClF + F2 → CIF3 -43.4 A. -217.5 kJ/mol B.-130.2 kJ/mol C. +217.5 kJ/mol ○ D.-108.7 kJ/mol E. none of these QUESTION 4 Consider the reaction: When a 12.9-g sample of ethyl alcohol(molar mass 46.07 g/mol) is burned, how much energy is released...
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...
7. Use the following thermochemical data to identify which statement is true pertaining to the reaction Fe,O,(s) + 3H2(g) à 2Fe(s) + 3H,O(g) AH(Feq (ə)) = -822 kJ mol AH(H0(9) --242 kJ mol 56.96 -0.090 kJ moi"! K S.= 0.131 kJ mollk! SPO = 0.027 kJ mol'k 54,00) -0.189 kJ mol-'k A The reaction is thermodynamically favourable at 20°C. B The standard enthalpy of the reaction is -96 kJ molt C The Gibbs energy change for the reaction at 500...
Question 16 of 45 Submit FeCl3 has a van't Hoff factor of 3.4. What is the freezing point of an aqueous solution made with 1.71 m FeCl3? (Kf for water is 1.86 °C/m) °C 4 7 5 8 6 9 Question 20 of 45 Submit Determine AGº for the phase change CO2(g) → CO2(aq) at 25°C. AH° = -19.4 kJ/mol AS° = +92.3 J/mol-K kJ/mol (1 4 7 +/- 2 5 8 3 6 9 0 x 100 May 7...
Tutored Practice Problem 19.3.5 COUNTS TOWARDS GRADE Calculate temperature at which AGº changes sign. Close Calculate the temperature (in kelvins) at which the sign of AGº changes from positive to negative for the reaction below. This corresponds to the temperature at which K<1 changes to K > 1. Assume that AH and AS are constant and do not change with temperature, Fe304(8) + 4H2(e) 3Fe(8) + 4H2O(g) AH° - 151 kJ/mol and AS - 169 J/K: mol Check & Submit...
IN ILLIULIOL JU_SUN/Lab%20Exams/CHEZ101%2... Submit Answer kJ/mol Tries 0/2 7. Consider the following reactions: A-B AH = 272 kJ C-B AH = 36 kJ What is AH for A C ? It is possible that your answer could be either positive or negative. If it is negative, you must include the "minus" sign. Enter your answer as a decimal number. k] Tries 0/2 Submit Answer 8. Consider the following reactions: A + 2B - C + D AH = -224 kJ...
8) HY 8) Consider a reaction that has a negative AH and a positive AS. Which of the following statements is true? A) This reaction will be spontaneous only at high temperatures. B) This reaction will be spontaneous at all temperatures C) This reaction will be nonspontaneous at all temperatures. D) This reaction will be nonspontaneous only at high temperatures. E) It is not possible to determine without more information 9) What is the volume of 5.60 g of O2...
Need help with #8 & 10. If they are
correct will rate high. Thank you!
8. The Haber process for the production of ammonia involves the equilibrium 2 NH3(g) → N2(g) + 3 H2(g) For this reaction, AH° = 92.38 kJ and AS = 198.3 J/K. Assume that AH° and AS° for this reaction do not change with temperature. (i) Predict the direction in which AG for the reaction changes with increasing temperature. (ii) Calculate AG at 25 °C and...
CHANGES IN ENTROPY OF UNIVERSE VS SYSTEM. Evaluating Spontaneity Considering both Entropy and Enthalpy 7. In a spontaneous process, which of the following always increases? a. the entropy of the system b. the entropy of the surroundings c. the entropy of the universe d. the entropy of the system and the universe c. the entropy of the system, surroundings and the universe (Hand S refer to the system), a. AH>0 8. Processes are always spontaneous, regardless of temperature, when and...
in 19 The following reaction takes place at 120°C-H 0(1) - H 0(g) Which of the following must be true? AH = 44.0 kJ mol AS = 0.119 kJ mol K ered ed out of Ein Select one: a. The reaction is spontaneous Flag question b. The reaction is not spontaneous CAG=0 d. AGO e. Two of these Finish attempt. Time left 3:13:19 e lp @ NI Wololol **** 2x Cy BN м.
At 25°C, the following heats of reaction are known: AH (kJ/mol 167.4 2CIF + 02 →Cl20 + F20 2ClF3 + 202 →Cl20+3F20 341.4 2F2 + 02 → 2F20 At the same temperature, calculate ΔH for the reaction: ClF + F2 → CIF3 -43.4 A. -217.5 kJ/mol B.-130.2 kJ/mol C. +217.5 kJ/mol ○ D.-108.7 kJ/mol E. none of these QUESTION 4 Consider the reaction: When a 12.9-g sample of ethyl alcohol(molar mass 46.07 g/mol) is burned, how much energy is released...
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