Transcription of Chapter 10 Worksheet #2 Answer
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Chapter 10 Worksheet #2 Answer
Name _____KEY_____ Block _____ Chapter 10 Worksheet #2 1. Calculate the energy require (in calories) to heat g of mercury from to Specific heat of mercury is J/goC. q = m c t q = g J/goC oC = J 1 cal = cal J 2. If 50. J of heat are applied to 10. g of iron, by how much will the temperature of the iron increase? The specific heat of iron is J/goC. t = q / m c t =50. J / J/goC = 50 J goC = 11 oC J 3. Calculate the amount of energy required (in calories) to heat 145 g of water from to q = m c t q =145 g J/goC (75 oC oC) = 145 g J/goC oC cal = 7640 cal 4. If kJ of heat is heated to a kg block of metal, the temperature of the metal increases by Calculate the specific heat capacity of the metal in J/goC. c = q / m t convert units KJ = 52,500 J and kg = 1,020 g c =52,500 J / 1, oC c = J/goC = J/goC 5.
7. Are the following processes exothermic or endothermic? a. the combustion of gasoline in a car engine Exothermic b. water condensing on a cold pipe Endothermic c. CO 2 (s) CO 2 (g) Endothermic d. F2 (g) 2 F (g) Exothermic 8. Why does ice float on the surface of liquid water? It is less dense then water (the Crystallized structure). 9.
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