Chapter 05 Problems.docx - Chapter 5 Problems 1 An...

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Chapter 5 Problems 1. An exothermic reaction causes the surroundings to A. warm up. B. become acidic. C. expand. D. decrease its temperature. E. release CO 2 . 2.Copper metal has a specific heat of 0.385 J/g· C. Calculate the amount of heat required to raise the temperature of 22.8 g of Cu from 20.0 C to 875 C. 3.If 325 g of water at 4.2 C absorbs 12.28 kJ, what is the final temperature of the water? The specific heat of water is 4.184 J/g· C. 4.Which of these processes is endothermic ? A. O 2 (g) + 2H 2 (g) 2H 2 O(g) B. H 2 O(g) H 2 O(l) C. 3O 2 (g) + 2CH 3 OH(g) 2CO 2 (g) + 2H 2 O(g) D. H 2 O(s) H 2 O(l) 5. According to the first law of thermodynamics: A. Energy is neither lost nor gained in any energy transformations. B. Perpetual motion is possible. C. Energy is conserved in quality but not in quantity. D. Energy is being created as time passes. We have more energy in the universe now than when time began. 6. A 0.1326 g sample of magnesium was burned in an oxygen bomb calorimeter. The total
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