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PracticeExam2a - Tufts University Chem 1 Summer 2008...

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Tufts University Chem 1 Summer 2008 Practice Exam 2a I. Multiple Choice Questions A Only one answer is assumed correct in each question. 1. All of the following are state functions except A) q B) T C) U D) H 2. Which of the following is a correct statement of the First Law of Thermodynamics? 3. Which of the following chemical equations is used to define the standard enthalpy of formation of ammonium perchlorate? A) ½N 2 (g) + ½Cl 2 (g) + 2O 2 (g) + 2H 2 (g) NH 4 ClO 4 (s) B) N 2 (g) + Cl 2 (g) + 4O 2 (g) + 4H 2 (g) 2NH 4 ClO 4 (s) C) NH 3 (g) + HClO 4 (l) NH 4 ClO 4 (s) D) All of the above E) None of the above 4. Which of the following describe a standard state at 25 o C? 5. Which of the following experiments most directly supports de Broglie's hypothesis of the wave nature of matter?
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6. Estimate the wavelength of the wave below. A) 3 nm B) 0.5 nm C) 1 nm D) 1.5 nm E) 2 nm 7. How many nodes are present in a 3s and a 3d orbital, respectively?
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