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21 % D, 4)) Tue 8:08 PM a Safari File Edit View History Bookmarks Window Help : E saplinglearning.com Announcements - CHEM 1330: College Chemistr University of Missouri, Columbia - CHEM 1330-... Thermodnamics - Chempendix kilojoules to joules - Google Search Attempts Score10/22/2015 11:55 PM 6.4/12 10/20/2015 06:57 PM Assignment Information Available From: 10/14/2015 10: Due Date: Points Possible: 12 Grade Category: Graded Description Policies Gradebook PrintCalculator Periodic Table 100 Question 12 of 15 10/22/2015 11 100 Mapoob University Science Books presented by Sapling Learning emi Donald McQuanrie Peter A. Rock Ethan Gallogy 100 Using the following data 100 Compound | Melting point (C) | hus (kJ/mol) | Boiling point (C) | dHvap (kJ/mol) HF HCI HBr Perry Fall15 83.11 114.3 -86.96 -50.91 4.577 1.991 2.406 2.871 19.54 84.9 -67.0 -35.38 25.18 17.53 19.27 21.16 You can check your answers. You can view solutions after the due You have five attempts per questio There is no penalty for incorrect an 6 calculate AStus and ASvap for HBir 67 Number 100 AS J/ (K- mol J/(K mol Help With This Topic 10 Web Help & Video:s Determine the entropy change when 3.60 mol of HBr( freezes at atmospheric pressure Technical Support and Bug R Number J/ K 13 Previous O Check Answer Next Exit 15 Hint opyright © 2011-2015 Sapling Learning, Inc.-11 3 about uscareers partnerspivacy policy terms of use contact us help

Explanation / Answer

entropy change,

deltaS(fus) = deltaH(fus)/T[mp]

                   = 2.406/(-86.96)

                   = 27.67 J/K.mol

deltaS(vap) = deltaH(vap)/T[bp]

                   = 19.27/(-67)

                   = -287.61 J/K.mol

entropy change when 3.6 mol of HBr freezes

deltaS = -27.67 x 3.60 = -99.61 J/K

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