ORGANIC CHEMISTRY
9th Edition
ISBN: 9780134645704
Author: WADE AND SIMEK
Publisher: PEARSON
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Chapter 26, Problem 26.28SP
Polyoxymethylene (polyformaldehyde) is the tough, self-lubricating Delrin® plastic used in gear wheels.
- a. Give the structure of polyformaldehyde.
- b. Formaldehyde is polymerized using an acidic catalyst Using H+ as a catalyst, propose a mechanism for the
polymerization as far as the trimer. - c. Is Delrin an
addition polymer or acondensation polymer ?
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Using reaction free energy to predict equilibrium composition
Consider the following equilibrium:
2NO2 (g) = N2O4(g)
AGº = -5.4 kJ
Now suppose a reaction vessel is filled with 4.53 atm of dinitrogen tetroxide (N2O4) at 279. °C. Answer the following questions about this system:
Under these conditions, will the pressure of N2O4 tend to rise or fall?
Is it possible to reverse this tendency by adding NO2?
In other words, if you said the pressure of N2O4 will tend to rise, can that
be changed to a tendency to fall by adding NO2? Similarly, if you said the
pressure of N2O4 will tend to fall, can that be changed to a tendency to
'2'
rise by adding NO2?
If you said the tendency can be reversed in the second question, calculate
the minimum pressure of NO 2 needed to reverse it.
Round your answer to 2 significant digits.
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fall
yes
no
☐ atm
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Ar
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Why do we analyse salt?
Curved arrows are used to illustrate the flow of electrons. Using
the provided starting and product structures, draw the curved
electron-pushing arrows for the following reaction or
mechanistic step(s).
Be sure to account for all bond-breaking and bond-making
steps.
H
H
CH3OH, H+
H
Select to Add Arrows
H°
0:0
'H
+
Q
HH
■ Select to Add Arrows
CH3OH,
H*
H.
H
CH3OH, H+
HH
■ Select to Add Arrows i
Please select a drawing or reagent from the question area
Chapter 26 Solutions
ORGANIC CHEMISTRY
Ch. 26.2A - Show the intermediate that would result if the...Ch. 26.2A - Prob. 26.2PCh. 26.2A - Prob. 26.3PCh. 26.2B - Prob. 26.4PCh. 26.2B - Prob. 26.5PCh. 26.2B - Chain branching occurs in cationic polymerization...Ch. 26.2C - Prob. 26.7PCh. 26.2C - Prob. 26.8PCh. 26.2C - Chain branching is not as common with anionic...Ch. 26.3 - Prob. 26.10P
Ch. 26.5 - Prob. 26.11PCh. 26.6 - Prob. 26.12PCh. 26.7A - Prob. 26.13PCh. 26.7B - Prob. 26.14PCh. 26.7B - Prob. 26.15PCh. 26.7C - a. Propose a mechanism for the reaction of...Ch. 26.7C - Prob. 26.17PCh. 26.7D - Prob. 26.18PCh. 26.7D - Prob. 26.19PCh. 26.7D - Prob. 26.20PCh. 26 - Prob. 26.21SPCh. 26 - Prob. 26.22SPCh. 26 - Poly(trimethylene carbamate) is used in...Ch. 26 - Prob. 26.24SPCh. 26 - Urylon fibers are used in premium fishing nets...Ch. 26 - Prob. 26.26SPCh. 26 - Prob. 26.27SPCh. 26 - Polyoxymethylene (polyformaldehyde) is the tough,...Ch. 26 - Prob. 26.29SPCh. 26 - Prob. 26.30SPCh. 26 - Prob. 26.31SPCh. 26 - Prob. 26.32SPCh. 26 - Prob. 26.33SPCh. 26 - Prob. 26.34SPCh. 26 - The polyester named Lactomer is an alternating...Ch. 26 - Prob. 26.36SP
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