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Midterm

CHEM 2011 Study Guide - Midterm Guide: Diethyl Ether, Vapor Pressure, Endothermic Process


Department
Chemistry
Course Code
CHEM 2011
Professor
Michael Mozurkewich
Study Guide
Midterm

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CHEM 2011.03 Test #3 November 28, 2012
Page 1 of 4
NAME: Solutions STUDENT NUMBER:________________
You have 50 minutes to complete this test. Calculators are permitted. Other electronics, such as
cell phones and iPods, are not. Make sure they are turned off and put away.
There are 4 questions. There are 30 total marks.
1.000 atm = 1.013 bar = 1.013×105 Pa 1.000 liter = 1000 cm3 = 1.000×10!3 m3
gas constant = 8.314 J K!1 mol!10.00° C = 273.15 K
1. )H°rxn = 29.29 kJ mol!1 for the reaction
Br2(l) + Cl2(g) W 2BrCl(g).
At 298 K, the equilibrium constant for this reaction is 2.03 bar.
[6] Calculate the equilibrium constant for this reaction at 345 K.
Solution:
This will give K2 > K1, as expected for an endothermic reaction.
K2 = 2.03 e1.611 = 10.2 bar (units are not required)
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