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Unformatted text preview: Chem. 1B Midterm Exam 1 Spring 2011, April 22, 2011 FORM B There are a total of 14 questions of equal value on the exam. You will keep the exam so you can check your answers. The answers to the exam will be posted on our course web page. Carefully check all your answers on your Scantron form. SCANTRON FORM: Completely fill bubbles Completely fill answers (1) Write your name (2) Bubble in FORM B (3) Bubble in your PERM number (7 digits only, no extra numbers) INFORMATION PAGE: Only aid allowed is the information page. No other notes or books are allowed. INSTRUCTIONS: Cell Phones, iPods, headsets, and any other electronic devices must be turned off and put away. Please remain seated until 12:50PM 1. Twelve identical gas molecules reside in a volume and explore every location within that volume with equal probability. The number of microstates, Ω max , corresponding to the positional configuration in which 6 molecules are in the left half of the volume and 6 in the right half of the volume Ω = 924 . What is the entropy change when the system passes from that state to one in which all 12 molecules find themselves simultaneously in the left half of the volume? (A) Δ = 3.0 / (B) ∆ = − . × ¡ / (C) ∆ = 24 ¢ ¡1 ¡1 (D) ∆ = 0 £ ¤ (E) ∆ = − 2.4 ¢ ¡1 ¡1 2. A volume containing 2.0 mols of gas initially at a pressure of 20.0 atm are A volume containing 2....
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This note was uploaded on 06/07/2011 for the course CHEM 1C taught by Professor Hooker during the Spring '06 term at UCSB.
- Spring '06