post-lab 8 ch 204 - obennoskey (blo242) – Post-lab 8 –...

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Unformatted text preview: obennoskey (blo242) – Post-lab 8 – Lyon – (52635) 1 This print-out should have 10 questions. Multiple-choice 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.

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post-lab 8 ch 204 - obennoskey (blo242) – Post-lab 8 –...

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