Chemistry Midterm Exam for Course 142A: Solutions and Equilibria and Gases, Exams of Chemistry

Download Chemistry Midterm Exam for Course 142A: Solutions and Equilibria and Gases and more Exams Chemistry in PDF only on Docsity! Name (please print)_________________________________ Signature_________________________________________ TA Name/Quiz Section______________________________ CHEMISTRY 142A Oleg Prezhdo Midterm Two (Closed Book) Tuesday, November 29, 2005 15 problem, equal weight. Not-multiple choice problems receive partial credit where applicable. NOTES: (a) Before starting check to make sure the exam has all the 7 pages, plus a list of constants and equations and a copy of the periodic table. (b) Print name and sign the first page. Print your name at the top of each page. This will allow us to put your exam back together if the staple comes loose. (c) The exam is over promptly at 9:20 AM. No work is allowed after that time. (d) If you need more room, do your work on the back of the page, and make sure to indicate this. Name_______________________________ 2 Chemical Equilibrium, Chapter 6. Problem 1. Problem 2. in terms of Kp for the original reaction (!) Problem 3. Name Problem 9. A cylinder is fitted with a movable piston. The pressure inside the cylinder is P, and the volume is V;. What is the new pressure in the system when the piston decreases the volume of the cylinder by half? Problem 10. Air is 79% N, and 21% O, by volume. Calculate the mass of oxygen in a 2.0 L bottle of air at 1.0 atm, 25°C Name_______________________________ 6 Problem 11. Problem 12. Sketch the plot of Problem 13. Name Problem 14. A gaseous mixture containing 1.5 mol Ar and 3.5 mol CO, has a total pressure of 7.0 atm. What is the partial pressure of CO;? Problem 15. Into a 3.00-liter container at 25°C are placed 1.23 moles of O, gas and 3.20 moles of solid C (graphite). If the carbon and oxygen react completely to form CO(g), what will be the final pressure in the container at 25°C?