CHEM 112 Study Guide - Midterm Guide: Vapor Pressure, Boiling Point, Freezing-Point Depression
27 Mar 2014
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Id: a: record your name and id number on the scantron form, record the test id letter in the top right box of the scantron form, record all of your answers on the scantron form. Do not wait until the end to do this : remain seated until the period is over, pass the scantron form to the center, take your exam with you. Identify the choice that best completes the statement or answers the question. Record this for question 1: d, e, a, b, c, if 355 g of ethanol (c2h5oh) is added to 645 g of water, what is the molality of the ethanol? a. b. c. d. e. 55. 0 m: the heat of formation of nacl(s) is 411. 1 kj/mol and the heat of formation of nacl(aq, 1 m) is 407. 3 kj/mol. Will the solution temperature increase or decrease when nacl is dissolved in water? a. 3. 8 kj/mol; increase: +3. 8 kj/mol; increase c.
