Chem152 Midterm And Answers

Chem152 Midterm And Answers

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EXAM 1 – FORM A 24 April 2009 Chem 1B Instructor: Ortony
INSTRUCTIONS: Use a pencil, fill in the bubbles dark and completely. Bubble in Form A on your Scantron Form Write your perm number and bubble in your perm number, write your name. Work out the answer to each problem on this exam then bubble in the correct answer on your scantron. Turn in BOTH the Scantron form and the exam. The equation sheet is on the last page, you may remove it from your exam. The key to the exam will be posted on the course webpage this afternoon. Exam scores will be posted on “Online Grades”. To access your grade you must create an account first, there is a link on our course webpage (everyone in Chem 1B must create an account – even if you already did so in the past).

Exam 1, Chem 1B – Form A Spring 2009, Instructor: Ortony 1.

Name:___________________________

One mole of an ideal gas is expanded from a volume of 1.50 L to a volume of 10.18 L against a constant external pressure of 1.03 atm. Calculate the work. (1 L• atm = 101.3 J) A) –8.79  102 J B) –8.94 J C) –9.06  102 J D) –0.0883 J E) 9.06 J

2.

Consider the following reaction: 2NO(g) + O 2 (g)  2NO 2 (g) H = –112 kJ Is the reaction endothermic or exothermic as written? A) It is exothermic. B) It is endothermic. C) This can't be determined without more information.

3.

Which of the following are state functions? A) work, heat B) work, heat, enthalpy, energy C) enthalpy, energy D) work, heat, enthalpy E) heat, enthalpy, energy Suppose you add 45 J of heat to a system, let it do 10. J of expansion work, and then return the system to its initial state by cooling and compression. Which statement is true for this process? A) H < E B) The work done in compressing the system must exactly equal the work done by the system in the expansion...