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Unformatted text preview: A system absorbs 85 kJ of heat from its surroundings while doing 29 kJ of work on the surroundings. Calculate the change in internal energy of the system and determine whether the process is endothermic or exothermic. CHEM 2045C: Quiz 6 Eng Q8059x06b Show your work for full credit THE END 5. (1 pt) What is the specific heat of water (in J/gC)? 6. (3 pts) The specific heat of iron is 0.450 J/gC. How many joules of heat are necessary to raise the temperature of a 1050 g block from 25.0 C to 88.5 C? 7. (3 pts) A 2.56 g sample of sulfur is burned in a bomb calorimeter. q bomb = +5050 J and q water = +18700 J. i. What is the heat of the reaction PER GRAM of sulfur? ii. Is pressure or volume constant during a bomb calorimetry experiment? Bonus. (2 pts) While preparing this quiz, Dr. Eng drank a soda which contained 1.50 10 2 (nutritional) Calories. How many (scientific) calories, and how many joules did he drink?...
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- Fall '10