CHM2132_DGD_assign3_2023 (3)
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CHM2132 DGD Assignment #3
•
One copy of your group’s solutions must be uploaded to Brightspace on your
Group page by 8 pm on Wednesday September 27
th
.
•
You must show your work to receive full credit.
•
Appropriate sig figs and units are required in the final answer.
•
Assignments that are not legible cannot be marked.
•
After the DGD, every student must record participation marks for each of their
group members using the link:
https://forms.gle/66vye2vv6dcdtbNN8
•
Students who do not complete the form will not receive credit for participation
at that DGD.
Question 1.
Alcohol fermentation involves the breakdown of glucose into ethanol and carbon
dioxide by the reaction:
C
6
H
12
O
6
(s)
®
2 C
2
H
5
OH (l) + 2 CO
2
(g)
a) How much heat would be liberated by a yeast culture that ferments 1.00 kg of
glucose under standard conditions? (Use textbook Table 2C.6 and 2C.7 in this
calculation.)
b) Calculate
D
U° for this process under standard conditions.
Question 2.
Suppose 25 mL of an ideal diatomic gas (
࠵?
!,#
$
=
%
&
࠵?
) at 28.6
o
C, 0.975 atm in a thermally
insulated syringe is injected into a thermally insulated tube having a volume of 5.00 mL.
a) If this process was carried out reversibly, what would be the final temperature of the
gas in the tube?
b) What is the final temperature of the gas in the tube if this compression was done by
the application of a constant external pressure of 3.65 atm?
Question 3.
Lithium batteries are widely used in portable electronic devices and electric vehicles.
However, operation of these batteries tends to generate heat, which can raise the
temperature of the device.
The amount of energy required to raise the temperature of
lithium is temperature dependent, and follows the relationship:
࠵?
!,#
$
(࠵?)
࠵? ࠵?
%&
࠵?࠵?࠵?
%&
= 0.1695 − 8.827 × 10
%’
࠵?
࠵?
+ 1.977 × 10
%(
࠵?
࠵?
)
)
− 1.487 × 10
%*
࠵?
࠵?
+
+
−
1.61 × 10
+
࠵?
)
࠵?
)
How much energy must be removed from a battery at 25.0
o
C containing 3.00 kg of
lithium (the amount that is in an electric vehicle battery) to prevent it from undergoing a
95.0
o
C
increase
in temperature under standard conditions?
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MISSED THIS? Watch KCV 11.9; Read Section 11.9. You can click on the Review link to access the section in your e Text.
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За.
Bromine and methanoic acid react in aqueous solution.
Br, (aq) + HCO0Н (ад) — 2Br (aq) + 2H" (аq) + Со, (g)
The reaction was monitored by measuring the volume of carbon dioxide produced as time
progressed.
o 5 10 15 20 25
[Source: © International Baccalaureate Organization 2019]
30
20
40
60
80
100
120
140
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Time / s
[Source: © International Baccalaureate Organization 2019]
Determine from the graph the rate of reaction at 20 s, in cm³ s1, showing your working.
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Module 12 HW Chi
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E Module 12 HW Chapter 21 - Selected Exercises
Question 5 of 8
-/1 E
Starting with diethyl malonate, and using any other reagents of your choice, show how you would prepare the following
compound:
Fill
1) ?
2) ?
Que
Multi
EtO
3)?
4) ?
5) ?
Choose from the following list of reagents:
OEt
HO.
Ques
Multipa
Questi
A
B
D
Multistep
CH3Br
LIAIH4
LDA
NaOEt / EtOH
Viewing
Multipart
Question
E
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H.
Molecular Dra
NaOH
EtBr
MgBr, H,O
H20, heat
heat
Question 7
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Two trials were completed in a kinetics experiment, resulting in the data collected below. Calculate the rate of each trial using the change in iodine concentration:
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Trial
Acetone, M
12, M
H*1, M
Time (sec)
Rate
1
1.8
0.0025
0.33
136
2
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Tutorial Rate Law.pdf
OMY AND
GENETICS THINKING SKILLS
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IOLOGY
SCIENCE
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Diethylhydrazine reacts with iodine according to the following equation:
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