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Unformatted text preview: Chemistry 114 Week 2 Worksheet Spring 2008 1. Find the heat transferred in kJ when 5.50 L of ethylene glycol (d = 1.11 g/mL, C = 2.42 J g-1 K- 1 ) in a car radiator cools from 37.0 C to 25.0 C. [-177 kJ] 2. A manufacturer claims that his new dietetic dessert has fewer than 10 Calories per serving. To test the claim, a chemist places one serving into a bomb calorimeter and burns it in O 2 . The temperature increases by 4.937C. The heat capacity of the calorimeter is 8.151 kJ K-1 . Is the manufacturers claim correct? (Show why or why not.) [q(rxn) = -40.24 kJ 10 Calories = 41.84 kJ so is more than produced by rxn, manufacturers claim is correct] 3. A chemist burns 0.8650 g of graphite (C( s )) in a new bomb calorimeter. If 393.5 kJ of heat is released per mole of graphite and the T of the calorimeter increases by 2.613 K, what is the heat capacity of the calorimeter? [10.85 kJ/K] 4. A 350.0 g piece of copper tubing is heated to 99.9C and placed in an insulated, open-top vesselA 350....
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- Spring '08