CHEM 212:CHEMISTSRY V 2
8th Edition
ISBN: 9781260304503
Author: SILBERBERG
Publisher: MCGRAW-HILL CUSTOM PUBLISHING
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Question
Chapter 22, Problem 22.1P
Interpretation Introduction
Interpretation:
The reason for higher abundance of hydrogen in universe and lower abundance in earth’s atmosphere has to be explained.
Expert Solution & Answer
Explanation of Solution
- The abundance of hydrogen in universe is far more than earth’s atmosphere. Hydrogen exists as
- The high abundance of hydrogen in universe is due to its simple atoms were the first created after the Big Bang.
- Because of hydrogen lowest density, it is only weakly held by gravitational field of earth.
- Hence, hydrogen is more abundant in universe than earth’s atmosphere.
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LTS
Solid:
AT=Te-Ti
Trial 1
Trial 2
Trial 3
Average
ΔΗ
Mass water, g
24.096
23.976
23.975
Moles of solid, mol
0.01763
001767
0101781
Temp. change, °C
2.9°C
11700
2.0°C
Heat of reaction, J
-292.37J -170.473
-193.26J
AH, kJ/mole
16.58K 9.647 kJ 10.85 kr
16.58K59.64701
KJ
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12.35k
Minimum AS,
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41.582
mol-k
Remember: q = mCsAT (m = mass of water, Cs=4.184J/g°C) & qsin =-qrxn &
Show your calculations for:
AH in J and then in kJ/mole for Trial 1:
qa (24.0969)(4.1845/g) (-2.9°C)=-292.37J
qsin =
qrxn =
292.35 292.37J
AH in J = 292.375 0.2923kJ
0.01763m01
=1.65×107
AH in kJ/mol =
=
16.58K
0.01763mol
mol
qrx
Minimum AS in J/mol K (Hint: use the average initial temperature of the three trials, con
Kelvin.)
AS=AHIT
(1.65×10(9.64×103) + (1.0
Jimai
For the compound: C8H17NO2
Use the following information to come up with a plausible structure:
8
This compound has "carboxylic acid amide" and ether functional groups.
The peaks at 1.2ppm are two signals that are overlapping one another.
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Vnk the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest bolling
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substance
C
D
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CH,-N-CH,
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Chapter 22 Solutions
CHEM 212:CHEMISTSRY V 2
Ch. 22 - Prob. 22.1PCh. 22 - Prob. 22.2PCh. 22 - Prob. 22.3PCh. 22 - Prob. 22.4PCh. 22 - Prob. 22.5PCh. 22 - Prob. 22.6PCh. 22 - Prob. 22.7PCh. 22 - Prob. 22.8PCh. 22 - Prob. 22.9PCh. 22 - Prob. 22.10P
Ch. 22 - Prob. 22.11PCh. 22 - Prob. 22.12PCh. 22 - Prob. 22.13PCh. 22 - Prob. 22.14PCh. 22 - Prob. 22.15PCh. 22 - Prob. 22.16PCh. 22 - Prob. 22.17PCh. 22 - Prob. 22.18PCh. 22 - Define: (a) ore; (b) mineral; (c) gangue; (d)...Ch. 22 - Define: (a) roasting; (b) smelting; (c) flotation;...Ch. 22 - What factors determine which reducing agent is...Ch. 22 - Prob. 22.22PCh. 22 - Prob. 22.23PCh. 22 - Prob. 22.24PCh. 22 - Prob. 22.25PCh. 22 - Prob. 22.26PCh. 22 - Prob. 22.27PCh. 22 - Why is cryolite used in the electrolysis of...Ch. 22 - Prob. 22.29PCh. 22 - How is Le Châtelier’s principle involved in the...Ch. 22 - Elemental Li and Na are prepared by electrolysis...Ch. 22 - A Downs cell operating at 77.0 A produces 31.0 kg...Ch. 22 - Prob. 22.33PCh. 22 - Prob. 22.34PCh. 22 - The last step in the Dow process for the...Ch. 22 - Prob. 22.36PCh. 22 - Prob. 22.37PCh. 22 - Prob. 22.38PCh. 22 - Prob. 22.39PCh. 22 - Prob. 22.40PCh. 22 - Prob. 22.41PCh. 22 - Prob. 22.42PCh. 22 - Prob. 22.43PCh. 22 - Prob. 22.44PCh. 22 - Prob. 22.45PCh. 22 - Prob. 22.46PCh. 22 - Prob. 22.47PCh. 22 - Prob. 22.48PCh. 22 - Prob. 22.49PCh. 22 - Prob. 22.50PCh. 22 - Prob. 22.51PCh. 22 - Prob. 22.52PCh. 22 - Prob. 22.53PCh. 22 - Prob. 22.54PCh. 22 - Prob. 22.55PCh. 22 - Prob. 22.56PCh. 22 - Prob. 22.57PCh. 22 - Prob. 22.58PCh. 22 - Prob. 22.59PCh. 22 - In the production of magnesium, Mg(OH)2 is...Ch. 22 - Prob. 22.61PCh. 22 - Prob. 22.62PCh. 22 - The production of S8 from the H2S(g) found in...Ch. 22 - Prob. 22.64PCh. 22 - Prob. 22.65PCh. 22 - Prob. 22.66PCh. 22 - Prob. 22.67PCh. 22 - Prob. 22.68PCh. 22 - Prob. 22.69PCh. 22 - Prob. 22.70PCh. 22 - Prob. 22.71PCh. 22 - Prob. 22.72PCh. 22 - Prob. 22.73PCh. 22 - Prob. 22.74PCh. 22 - Prob. 22.75PCh. 22 - Prob. 22.76PCh. 22 - Prob. 22.77PCh. 22 - Prob. 22.78PCh. 22 - Prob. 22.79PCh. 22 - Prob. 22.80PCh. 22 - Prob. 22.81PCh. 22 - Prob. 22.82PCh. 22 - Prob. 22.83PCh. 22 - Prob. 22.84PCh. 22 - Prob. 22.85PCh. 22 - Prob. 22.86P
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