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6. How much heat does a 15-gram piece of aluminum metal release as it cools from 260°C to 35°C? 4.18 J a. 3375 J с. b. 3027 J d. 6054 J

6. How much heat does a 15-gram piece of aluminum metal release as it cools from 260°C to 35°C? 4.18 J a. 3375 J с. b. 3027 J d. 6054 J

Living by Chemistry
Living by Chemistry
2nd Edition
ISBN:9781464142314
Author:Angelica M. Stacy
Publisher:Angelica M. Stacy
ChapterU5: Fire: Energy , Thermodynamics, And Oxidation-reduction
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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? A. 1. evaporation of alcohol condensation of water vapor items. boiling of water 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) magnesium (c=1.020 J/g-°C) C. a, d. 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,() 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 AH=571.6 kJ/mol H,Og) → H(g) + 0,g) с. d. 2H,O() → 2H,(g) + 0,(g) 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,(g) с. d. 2NO,(g) → N,O,(g) AH=-58,6 kJ/mol 6. How much heat does a 15-gram piece of aluminum metal release as it cools from 260°C to 35°C? с. 3375 J 4.18 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? с. 223 kJ a. 53 kJ d. 301 kJ 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? A. 1. evaporation of alcohol condensation of water vapor items. boiling of water 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) magnesium (c=1.020 J/g-°C) C. a, d. 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,() 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 AH=571.6 kJ/mol H,Og) → H(g) + 0,g) с. d. 2H,O() → 2H,(g) + 0,(g) 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,(g) с. d. 2NO,(g) → N,O,(g) AH=-58,6 kJ/mol 6. How much heat does a 15-gram piece of aluminum metal release as it cools from 260°C to 35°C? с. 3375 J 4.18 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? с. 223 kJ a. 53 kJ d. 301 kJ b. 72 kJ Chapter 3 Energy in Transit 71
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