homework4KEY spr08(2)

homework4KEY spr08(2) - CHEM 1016 Homework#4 Posted Due...

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CHEM 1016 Homework #4 Posted: January 28, 2008 Due: Tuesday, February 5, 2008 Choose the correct response to each of the following multiple choice questions and fill in the corresponding space on your orange opscan. 1. All of these are examples of potential energy, except 1. energy stored by position 2. energy in nuclear particles 3. energy of a moving object***** 4. energy in chemical bonds 2. Burning 1 mole of methane in oxygen to form carbon dioxide and water produces 803 kJ of energy. How much energy is produced when 3 moles of methane is burned? 1. 268 kJ 2. 803 kJ 3. 1606 kJ 4. 2409 kJ***** 3. The SI unit of energy is the 1. joule.***** 2. calorie. 3. gram. 4. watt. 4. The solar energy absorbing molecules of plants that power photosynthesis are called 1. carbohydrates. 2. photovoltaics. 3. solarases. 4. chlorophylls.****** 5. A watt is 1. 1 s/joule 2. 1 cal/s 3. 1 joule/s**** 4. 1 s/cal
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6. Which of the following situations would be an example of kinetic energy? 1. a compressed spring 2. a nuclear explosion***** 3. a tank of gasoline 4. a batter waiting for the ball to be pitched 7. The decomposition of 2 mol of water to hydrogen and oxygen requires 137 kcal of energy. The reaction of hydrogen and oxygen to form 2 mol of water 1. requires 137 kcal. 2. releases 137 kcal.***** 3. requires more than 137 kcal. 4. releases more than 137 kcal. 8. According to kinetic-molecular theory, reactions occur more rapidly at higher temperatures because 1. molecules move faster at higher temperatures. 2. molecules collide more frequently at higher temperatures. 3. molecules have more energy at higher temperatures. 4. all of the above***** 9. Which of the following will cause the rate of a chemical reaction to speed up? 1.
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This note was uploaded on 04/03/2008 for the course CHEM 1016 taught by Professor Eddleton during the Spring '08 term at Virginia Tech.

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homework4KEY spr08(2) - CHEM 1016 Homework#4 Posted Due...

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