Exam1.FormB.GreenVersion.2010

Exam1.FormB.GreenVersion.2010 - Chem 1B Exam I 2010 Name...

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1 Chem. 1B Exam I 2010 Name: Last Name First Name FORM B There are a total of five pages ( 23 questions ) on the exam. Show all your work on the exam and circle the answers. 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 1) Write your name Completely fill answers 2) Bubble in FORM B 3) Bubble in your PERM number (7 digits only, no extra numbers) INFORMATION PAGE: Remove the information page. No other notes or books are allowed. INSTRUCTIONS: No hats or hoods allowed. No sharing of calculators. Cell Phones, iPods, headsets, and any other electronic devices must be turned off and put away. Remain seated until 9:50 AM 1. (5 pts) A gas absorbs 30.5 kJ of heat and then the gas does 4.2 kJ of work. What is the change in internal energy of the gas? ANSWERS are given at the end of the exam A) 34.7 kJ B) 30.5 kJ C) – 26.3 kJ D) 26.3 kJ E) –34.7 kJ Questions 2 – 4: (3 pts each) There are two containers, one has 1 mole of CO 2 (g) and the other has 1 mole of Ne (g). Both gases are heated from 25 o C to 30 o C at constant pressure. Indicate true or false. 2. The change in internal energy of CO 2 (g) is greater than it is for Ne (g) A) true B) false 3. More work is done in heating Ne (g) than for CO 2 (g) A) true B) false 4. No work is done in heating either gas A) true B) false
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