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Unformatted text preview: Version 081 Quiz 6 laude (50995) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. Constants R = 8 . 314 J K 1 mol 1 = k N A k = 1 . 381 10 23 J K 1 N A = 6 . 626 10 23 mol 1 Equations U = 0 . 5 kT S = k ln W S = q T G = H- T S U = q + w = q v = H + P V H = q p q = mc T =- H w =- P V =- n gas RT S universe S universe = S sys + S surr G sys =- T S universe 001 5.0 points When calculating positional entropy at ab- solute zero using the Boltzmann formula ( S = k ln W ), which of the following state- ments is/are true? I) An experimentally determined value of W is less than the ideal value. II) If S = R ln2 for 1 mol of some com- pound, then a single molecule of the same compound has a positional entropy of S = N A R ln 2, where N A is Avogadros number. III) The positional entropy of a group of molecules with one orientation will equal zero. 1. I, III correct 2. I only 3. II only 4. III only 5. I, II 6. I, II, III 7. II, III Explanation: Statement I is true because ideal values as-...
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- Spring '11