Laboratory Manual Chemistry in Context
8th Edition
ISBN: 9780073518121
Author: American Chemical Society
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 4, Problem 15Q
During petroleum distillation, kerosene and hydrocarbons with 12–18 carbons used for diesel fuel condense at position C marked on this diagram.
- a. Separating hydrocarbons by distillation depends on differences in a specific physical property. Which one?
- b. How does the number of carbon atoms in the hydrocarbon molecules separated at A, B, and D compare with those separated at position C? Explain your reasoning,
- c. How do the uses of the hydrocarbons separated at A, B, and D differ from those separated at position C? Explain your reasoning.
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Using reaction free energy to predict equilibrium composition
Consider the following equilibrium:
N2O4 (g) 2NO2 (g)
AG⁰ = 5.4 kJ
Now suppose a reaction vessel is filled with 1.68 atm of dinitrogen tetroxide (N204) at 148. °C. Answer the following questions about this system:
rise
Under these conditions, will the pressure of N2O4 tend to rise or fall?
x10
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
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.
yes
no
0.42 atm
☑
5
0/5
?
مله
Ar
Homework 13 (Ch17)
Question 4 of 4 (1 point) | Question Attempt: 2 of 2
✓ 1
✓ 2
= 3
4
Time Remaining: 4:25:54
Using the thermodynamic information in the ALEKS Data tab, calculate the standard reaction free energy of the following chemical reaction:
2CH3OH (g)+302 (g) → 2CO2 (g) + 4H₂O (g)
Round your answer to zero decimal places.
☐ kJ
x10
☐
Subm
Check
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Identifying the major species in weak acid or weak base equilibria
Your answer is incorrect.
• Row 2: Your answer is incorrect.
• Row 3: Your answer is incorrect.
• Row 6: Your answer is incorrect.
0/5
The preparations of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major species present at
equilibrium. You can leave out water itself.
Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the
formulas of the species that will act as neither acids nor bases in the 'other' row.
You will find it useful to keep in mind that HF is a weak acid.
acids:
HF
0.1 mol of NaOH is added to
1.0 L of a 0.7M HF
solution.
bases:
0.13 mol of HCl is added to
1.0 L of a solution that is
1.0M in both HF and KF.
Exponent
other:
F
acids: HF
bases: F
other:
K
1
0,0,...
?
000
18
Ar
Chapter 4 Solutions
Laboratory Manual Chemistry in Context
Ch. 4.1 - Although power plants require several steps to...Ch. 4.1 - Prob. 4.3YTCh. 4.2 - Prob. 4.5CTCh. 4.3 - Prob. 4.7CTCh. 4.3 - Prob. 4.9YTCh. 4.4 - Prob. 4.10CTCh. 4.4 - The combustion of one gram of natural gas releases...Ch. 4.4 - Prob. 4.12CTCh. 4.5 - Prob. 4.14SCCh. 4.5 - Scientific Practices Coal Versus Ethanol On the...
Ch. 4.6 - Prob. 4.17YTCh. 4.7 - Beginning in the 1920s, the octane-booster...Ch. 4.9 - Prob. 4.21CTCh. 4.10 - Prob. 4.22CTCh. 4.11 - Have you ever been served cherries Jubilee or...Ch. 4.11 - Prob. 4.26CTCh. 4 - Prob. 4.1CTCh. 4 - Prob. 1QCh. 4 - Prob. 2QCh. 4 - Prob. 3QCh. 4 - Energy exists in different forms in our natural...Ch. 4 - A coal-burning power plant generates electrical...Ch. 4 - Prob. 6QCh. 4 - Prob. 7QCh. 4 - Prob. 8QCh. 4 - Mercury (Hg) is present in trace amounts in coal,...Ch. 4 - Prob. 10QCh. 4 - Here are the condensed structural formulas for two...Ch. 4 - Prob. 12QCh. 4 - Prob. 13QCh. 4 - Prob. 14QCh. 4 - During petroleum distillation, kerosene and...Ch. 4 - Prob. 16QCh. 4 - a. Write the balanced chemical equation for the...Ch. 4 - Prob. 18QCh. 4 - Prob. 19QCh. 4 - State whether these processes are endothermic or...Ch. 4 - Use the bond energies in Table 5.1 to calculate...Ch. 4 - Use the bond energies in Table 5.1 to calculate...Ch. 4 - Ethanol can be produced by fermentation. Another...Ch. 4 - Here are structural formulas for ethane, ethene...Ch. 4 - These three compounds all have the same chemical...Ch. 4 - Catalysts speed up cracking reactions in oil...Ch. 4 - Explain why cracking is a necessary part of the...Ch. 4 - Consider this equation representing the process of...Ch. 4 - Prob. 29QCh. 4 - Consider these three alcohols: methanol, ethanol,...Ch. 4 - Prob. 31QCh. 4 - Prob. 32QCh. 4 - Prob. 33QCh. 4 - Compare and contrast a molecule of biodiesel with...Ch. 4 - Use Figure 5.6 to compare the energy released for...Ch. 4 - Prob. 36QCh. 4 - The sustainability of burning coal (and other...Ch. 4 - In this chapter, we approximated the chemical...Ch. 4 - Prob. 39QCh. 4 - Compare the processes of combustion and...Ch. 4 - How might you explain the difference between...Ch. 4 - Write a response to this statement: Because of the...Ch. 4 - The concept of entropy and probability is used in...Ch. 4 - Bond energies such as those in Table 5.1 are...Ch. 4 - Use the bond energies in Table 5.1 to explain why...Ch. 4 - Prob. 46QCh. 4 - Prob. 47QCh. 4 - Prob. 48QCh. 4 - Prob. 49QCh. 4 - Prob. 50QCh. 4 - Prob. 51QCh. 4 - Prob. 52QCh. 4 - Prob. 53QCh. 4 - Use a diagram to show the relationship among these...Ch. 4 - On a timescale of a few years, the combustion of...Ch. 4 - Prob. 56QCh. 4 - Emissions of some pollutants are lower when...Ch. 4 - Although coal contains only trace amounts of...Ch. 4 - Prob. 59QCh. 4 - An article in Scientific American pointed out that...Ch. 4 - C. P. Snow, a noted scientist and author, wrote an...Ch. 4 - Chemical explosions are very exothermic reactions....Ch. 4 - Prob. 64QCh. 4 - Tetraethyllead (TEL) was first approved for use in...Ch. 4 - Tetraethyllead (TEL) has an octane rating of 270....Ch. 4 - Another type of catalyst used in the combustion of...Ch. 4 - Figure 5.8 shows energy differences for the...Ch. 4 - Prob. 69Q
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- Using reaction free energy to predict equilibrium composition Consider the following equilibrium: 2NOCI (g) 2NO (g) + Cl2 (g) AGº =41. kJ Now suppose a reaction vessel is filled with 4.50 atm of nitrosyl chloride (NOCI) and 6.38 atm of chlorine (C12) at 212. °C. Answer the following questions about this system: ? rise Under these conditions, will the pressure of NOCI tend to rise or fall? x10 fall Is it possible to reverse this tendency by adding NO? In other words, if you said the pressure of NOCI will tend to rise, can that be changed to a tendency to fall by adding NO? Similarly, if you said the pressure of NOCI will tend to fall, can that be changed to a tendency to rise by adding NO? yes no If you said the tendency can be reversed in the second question, calculate the minimum pressure of NO needed to reverse it. Round your answer to 2 significant digits. 0.035 atm ✓ G 00. 18 Ararrow_forwardHighlight each glycosidic bond in the molecule below. Then answer the questions in the table under the drawing area. HO- HO- -0 OH OH HO NG HO- HO- OH OH OH OH NG OHarrow_forward€ + Suppose the molecule in the drawing area below were reacted with H₂ over a platinum catalyst. Edit the molecule to show what would happen to it. That is, turn it into the product of the reaction. Also, write the name of the product molecule under the drawing area. Name: ☐ H C=0 X H- OH HO- H HO- -H CH₂OH ×arrow_forward
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