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Unformatted text preview: obennoskey (blo242) – Postlab 8 – Lyon – (52635) 1 This printout should have 10 questions. Multiplechoice questions may continue on the next column or page – find all choices before answering. 001 10.0 points An endothermic reaction corresponds to one in which 1. Δ H is positive; heat is absorbed 2. Δ H is negative; heat is absorbed 3. Δ H is negative; heat is evolved 4. Δ H is positive; heat is evolved 002 10.0 points If 12.0 g of water at 10 . ◦ C are mixed with 8.0 g of water at 20 . ◦ C, what temperature will the 20.0 g of combined water be at once they reach equilibrium? 1. 12 . 5 ◦ C 2. 16 . ◦ C 3. 17 . 5 ◦ C 4. 30 . ◦ C 5. 14 . ◦ C 003 10.0 points Given the following thermodynamic data, 2H 2 O(g) → O 2 (g) + 2H 2 (g) ΔH rxn = 483 . 6kJ H 2 O(g) → H 2 O(l) ΔH rxn = 44 . 0kJ What is the molar heat of formation for liquid water, H 2 O (l)? Answer in units of kJ / mole. 004 10.0 points Assume that the volume of solution for the reaction is the same volume used to deter mine the heat capacity of the calorimeter. Allmine the heat capacity of the calorimeter....
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This note was uploaded on 04/14/2010 for the course CH CH302 taught by Professor Mccord during the Spring '10 term at University of Texas at Dallas, Richardson.
 Spring '10
 MCCORD

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