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8. A 7.0-gram metal sample absorbed 211 J of heat as it was heated from 28°C to 85°C. W containing 150 grams of water initially at 27.4°C. If the temperature of the water inCrese is the specific heat of the metal? 0.126 J/g-°C 0.267 J/g-°C В. Се 1. 0.529 J/g.°C C. a. d. 1.133 J/g.°C b. insulated calorime 9. The heat of dissolution of a solid substance was determined using an to 32.8°C, what is the heat of dissolution of the solid? -3386 J 3386 J -810 J C. a. b. 810 J d. ormY was spent on compressing a gas

8. A 7.0-gram metal sample absorbed 211 J of heat as it was heated from 28°C to 85°C. W containing 150 grams of water initially at 27.4°C. If the temperature of the water inCrese is the specific heat of the metal? 0.126 J/g-°C 0.267 J/g-°C В. Се 1. 0.529 J/g.°C C. a. d. 1.133 J/g.°C b. insulated calorime 9. The heat of dissolution of a solid substance was determined using an to 32.8°C, what is the heat of dissolution of the solid? -3386 J 3386 J -810 J C. a. b. 810 J d. ormY was spent on compressing a gas

Chemistry
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
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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A 7.0-gram metal sample absorbed 211 J of heat as it was heated from 28°C to 85°C. Wh containing 150 grams of water initially at 27.4°C. If the temperature of the water increase The heat of dissolution of a solid substance was determined using an insulated calorimete 8. Critical is the specific heat of the metal? 0.126 J/g-°C b. 0.267 J/g-°C 0.529 J/g.°C 1.133 J/g.°C B. C. 1. An a. d. in rele roc 9. ma to 32.8°C, what is the heat of dissolution of the solid? C. an -3386 J d. 3386 J -810 J a. How much work was done when 46 kJ of energy was spent on compressing a pas released 28 kJ of heat? b. 810 J 10. -74 kJ C. 2. -18 kJ a. d. 74 kJ b. 18 kJ 11. What is the energy change of a system as it does 12 J of work and absorbed 27 J of hea -39 J C. -15 J a. d. 39 J b. 15 J 12. Which of the following will have a standard enthalpy of formation equal to zero? NO,(g) 3. N(g) b. СО) с. a. d. MgCl,(s) The standard molar enthalpy of formation of calcium carbonate (CACO,) is –1206.9 kJ/mol What will be the enthalpy for the formation of 75 g of CaCO,? (MM=100.1 g/mol) 13. -1 206.9 kJ -904.3 kJ Consider the hypothetical reaction below. What is the enthalpy for its reverse reaction? 16.09 kJ a. C. b. d. 603.4 kJ 14. A + 3B = 2C AH=357.2 kJ -357.2 kJ a. E 178.6 kJ 714.4 kJ C. b. -178.6 kJ d. 4. 15. Consider the reactions below. 5. 2A + B = 2C AH=-115.2 kJ 6. B + D = C What will be the value of AH for the overall reaction below? AH=-98.4 kJ 2A = B + 2D -312 kJ a. b. -214 kJ 16.8 kJ d. 81.6 kJ C. 72 Exploring Life Through Science-General Chemistry 2
Transcribed Image Text:A 7.0-gram metal sample absorbed 211 J of heat as it was heated from 28°C to 85°C. Wh containing 150 grams of water initially at 27.4°C. If the temperature of the water increase The heat of dissolution of a solid substance was determined using an insulated calorimete 8. Critical is the specific heat of the metal? 0.126 J/g-°C b. 0.267 J/g-°C 0.529 J/g.°C 1.133 J/g.°C B. C. 1. An a. d. in rele roc 9. ma to 32.8°C, what is the heat of dissolution of the solid? C. an -3386 J d. 3386 J -810 J a. How much work was done when 46 kJ of energy was spent on compressing a pas released 28 kJ of heat? b. 810 J 10. -74 kJ C. 2. -18 kJ a. d. 74 kJ b. 18 kJ 11. What is the energy change of a system as it does 12 J of work and absorbed 27 J of hea -39 J C. -15 J a. d. 39 J b. 15 J 12. Which of the following will have a standard enthalpy of formation equal to zero? NO,(g) 3. N(g) b. СО) с. a. d. MgCl,(s) The standard molar enthalpy of formation of calcium carbonate (CACO,) is –1206.9 kJ/mol What will be the enthalpy for the formation of 75 g of CaCO,? (MM=100.1 g/mol) 13. -1 206.9 kJ -904.3 kJ Consider the hypothetical reaction below. What is the enthalpy for its reverse reaction? 16.09 kJ a. C. b. d. 603.4 kJ 14. A + 3B = 2C AH=357.2 kJ -357.2 kJ a. E 178.6 kJ 714.4 kJ C. b. -178.6 kJ d. 4. 15. Consider the reactions below. 5. 2A + B = 2C AH=-115.2 kJ 6. B + D = C What will be the value of AH for the overall reaction below? AH=-98.4 kJ 2A = B + 2D -312 kJ a. b. -214 kJ 16.8 kJ d. 81.6 kJ C. 72 Exploring Life Through Science-General Chemistry 2
Test Yourself ochromic osed to " shirts, rface of Multiple Choice. Choose the letter that corresponds to the correct answer. Which of the following physical processes is exothermic? boiling of water A. 1. evaporation of alcohol condensation of water vapor items. C. a d. b. melting of ice An aqueous solution becomes cold when a solid is dissolved in the water. What does the decrease in temperature imply? 2. The solid is insoluble. The process is exothermic. с. a. d. The process is endothermic. b. The solid releases heat. Which of the following will be the best conductor of heat? aluminum (c=0.900 J/g.°C) 3. lead (c=0.160 J/g.°C) C. a, d. magnesium (c=1.020 J/g-°C) copper (c=0.385 J/g.°C) Electrolysis dissociates liquid water molecules into hydrogen and oxygen gases with the use of electricity. Which thermochemical equation represents the reaction? b. 4. H,(g) + 0,(g) - H,O() AH=-285.8 kJ/mol a. b. 2H,(g) + 0,(g) 2H,O(1) AH= 571.6 kJ/mol AH= 285.8 kJ/mol H,Og) → 2H,O() → 2H,(g) + 0,(g) H(g) + 0,g) с. AH=571.6 kJ/mol d. Nitrogen dioxide (NO,) is cooled to produce dinitrogen tetroxide (N,O,). Which thermo- chemical equation represents the reverse reaction? 5. AH? of NO,=33.9 kJ/mol AH? of N,O,=9.2 kJ/mol AH=24.7 kJ/mol - 2NO,(g) → 2NO,(g) N,O.(g) a. AH=58,6 kJ/mol AH=-24.7 kJ/mol b. N,0,(g) 2NO,(g) N,O,() с. d. 2NO,(g) → N,O,(g) AH=-58,6 kJ/mol How much heat does a 15-gram piece of aluminum metal release as it cools from 260°C to 35°C? 6. 4.18 J с. 3375 J a. 3027 J d. 6054 J b. 7. How much heat is absorbed by 750 grams of water as it is heated from 25.0°C to 96.0°C? 223 kJ d. 301 kJ с. 53 kJ a. b. 72 kJ Chapter 3 Energy in Transit 71
Transcribed Image Text:Test Yourself ochromic osed to " shirts, rface of Multiple Choice. Choose the letter that corresponds to the correct answer. Which of the following physical processes is exothermic? boiling of water A. 1. evaporation of alcohol condensation of water vapor items. C. a d. b. melting of ice An aqueous solution becomes cold when a solid is dissolved in the water. What does the decrease in temperature imply? 2. The solid is insoluble. The process is exothermic. с. a. d. The process is endothermic. b. The solid releases heat. Which of the following will be the best conductor of heat? aluminum (c=0.900 J/g.°C) 3. lead (c=0.160 J/g.°C) C. a, d. magnesium (c=1.020 J/g-°C) copper (c=0.385 J/g.°C) Electrolysis dissociates liquid water molecules into hydrogen and oxygen gases with the use of electricity. Which thermochemical equation represents the reaction? b. 4. H,(g) + 0,(g) - H,O() AH=-285.8 kJ/mol a. b. 2H,(g) + 0,(g) 2H,O(1) AH= 571.6 kJ/mol AH= 285.8 kJ/mol H,Og) → 2H,O() → 2H,(g) + 0,(g) H(g) + 0,g) с. AH=571.6 kJ/mol d. Nitrogen dioxide (NO,) is cooled to produce dinitrogen tetroxide (N,O,). Which thermo- chemical equation represents the reverse reaction? 5. AH? of NO,=33.9 kJ/mol AH? of N,O,=9.2 kJ/mol AH=24.7 kJ/mol - 2NO,(g) → 2NO,(g) N,O.(g) a. AH=58,6 kJ/mol AH=-24.7 kJ/mol b. N,0,(g) 2NO,(g) N,O,() с. d. 2NO,(g) → N,O,(g) AH=-58,6 kJ/mol How much heat does a 15-gram piece of aluminum metal release as it cools from 260°C to 35°C? 6. 4.18 J с. 3375 J a. 3027 J d. 6054 J b. 7. How much heat is absorbed by 750 grams of water as it is heated from 25.0°C to 96.0°C? 223 kJ d. 301 kJ с. 53 kJ a. b. 72 kJ Chapter 3 Energy in Transit 71
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