1. Polymerization reactions are complicated somewhat because they involve very large numbers of molecules. But we can demonstrate the general features of the thermodynamics of polymerization by considering a much smaller model system. Instead of considering the formation of polyethylene, for example, we can begin with the following reaction in which two ethylene molecules combine with hydrogen to form butane: 2 C2HA + H2w → GH1000 Use the table below to calculate AS°.
1. Polymerization reactions are complicated somewhat because they involve very large numbers of molecules. But we can demonstrate the general features of the thermodynamics of polymerization by considering a much smaller model system. Instead of considering the formation of polyethylene, for example, we can begin with the following reaction in which two ethylene molecules combine with hydrogen to form butane: 2 C2HA + H2w → GH1000 Use the table below to calculate AS°.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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
Transcribed Image Text:1. Polymerization reactions are complicated somewhat because they involve very large numbers
of molecules. But we can demonstrate the general features of the thermodynamics of
polymerization by considering a much smaller model system. Instead of considering the
formation of polyethylene, for example, we can begin with the following reaction in which two
ethylene molecules combine with hydrogen to form butane:
2 C2HAW + H2 → CH100)
Use the table below to calculate ASO.
so
Compound
(J mol" K')
Compound
(J mol" K')
1J0.6
CO,(g)
213.6
205.0
310.03
I1,0()
69.91
CI L(1)
186.2
I1,0)
188.7
219.5
1923
C,I,N(O
178.91
2. The heat of fusion of crystalline polyethylene is approximately 7.7 kJ/mol, and the
corresponding entropy change for melting is 19J/mol K. Use these data to estimate the melting
point of polyethylene.
3. The reaction in Problem 1 is a spontaneous reaction because it is strongly exothermic. Confirm
this by calculating the standard free energy change for the same reaction using values from
the table below.
AGO
( mol")
AGP
Compound
(W mol')
Compound
-J944
-15.71
-37.2
-50.75
68.12
-165
62.75
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