Chemistry - Modified MasteringChemistry
7th Edition
ISBN: 9780133892321
Author: McMurry
Publisher: PEARSON
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Chapter 9, Problem 9.27P
a)
Interpretation Introduction
To determine:
The PV work energy flow in kilojoules during the combustion from claiming
b)
Interpretation Introduction
To determine:
Find the internal energy
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(a
4 shows scanning electron microscope (SEM) images of extruded
actions of packing bed for two capillary columns of different diameters,
al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the
same stationary phase, spherical particles with 1-um diameter.
A) When the columns were prepared, the figure shows that the column with
the larger diameter has more packing irregularities. Explain this observation.
B) Predict what affect this should have on band broadening and discuss your
prediction using the van Deemter terms.
C) Does this figure support your explanations in application question 33?
Explain why or why not and make any changes in your answers in light of
this figure.
Figure 4 SEM images of
sections of packed columns
for a) 750 and b) 30-um-i.d.
capillary columns.³
fcrip
= ↓ bandwidth Il temp
32. What impact (increase, decrease, or no change) does each of the following conditions have on the individual
components of the van Deemter equation and consequently, band broadening?
Increase temperature
Longer column
Using a gas mobile phase
instead of liquid
Smaller particle stationary phase
Multiple Paths
Diffusion
Mass Transfer
34. Figure 3 shows Van Deemter plots for a solute molecule using different column inner diameters (i.d.).
A) Predict whether decreasing the column inner diameters increase or decrease bandwidth.
B) Predict which van Deemter equation coefficient (A, B, or C) has the greatest effect on increasing or
decreasing bandwidth as a function of i.d. and justify your answer.
Figure 3 Van Deemter plots for hydroquinone using different column inner diameters (i.d. in μm). The data was
obtained from liquid chromatography experiments using fused-silica capillary columns packed with 1.0-μm particles.
35
20
H(um)
큰 20
15
90
0+
1500
100
75
550
01
02
594
05
μ(cm/sec)
30
15
10
Chapter 9 Solutions
Chemistry - Modified MasteringChemistry
Ch. 9 - Prob. 9.1PCh. 9 - Conceptual APPLY 9.2 How much work is done in...Ch. 9 - PRACTICE 9.3 The reaction between hydrogen and...Ch. 9 - Conceptual APPLY 9.4 The following reaction has E...Ch. 9 - PRACTICE 9.5 Use the following t her mo chemical...Ch. 9 - APPLY 9.6 Approximately, 1.8106 kJ of energy is...Ch. 9 - PRACTICE 9.7 Indicate the direction of heat...Ch. 9 - APPLY 9.8 Instant hot packs and cold packs contain...Ch. 9 - PRACTICE 9.9 What is the specific heat of lead in...Ch. 9 - APPLY 9.10 Calculate the heat capacity (C) of a...
Ch. 9 - PRACTICE 9.11 When 25.0 mL of 1.0 M H2SO4 is added...Ch. 9 - Prob. 9.12ACh. 9 - Prob. 9.13PCh. 9 - Prob. 9.14ACh. 9 - Prob. 9.15PCh. 9 - Prob. 9.16ACh. 9 - Prob. 9.17PCh. 9 - APPLY 9.18 Benzene (C6H6) has two resonance...Ch. 9 - Prob. 9.19PCh. 9 - Prob. 9.20ACh. 9 - Prob. 9.21PCh. 9 - Prob. 9.22ACh. 9 - Prob. 9.23PCh. 9 - Prob. 9.24ACh. 9 - Prob. 9.25PCh. 9 - Prob. 9.26PCh. 9 - Prob. 9.27PCh. 9 - Prob. 9.28PCh. 9 - Prob. 9.29PCh. 9 - A piece of dry ice (solid CO2) is placed inside a...Ch. 9 - Imagine a reaction that results in a change in...Ch. 9 - 9.32 Redraw the following diagram to represent the...Ch. 9 - 9.33 A reaction is carried out in a cylinder...Ch. 9 - Prob. 9.34CPCh. 9 - Prob. 9.35CPCh. 9 - Prob. 9.36CPCh. 9 - Prob. 9.37CPCh. 9 - Prob. 9.38CPCh. 9 - Prob. 9.39CPCh. 9 - What is the difference between heat and...Ch. 9 - What is internal energy?Ch. 9 - Prob. 9.42SPCh. 9 - Prob. 9.43SPCh. 9 - Which of the following are state functions, and...Ch. 9 - Prob. 9.45SPCh. 9 - Calculate the work done in joules by a chemical...Ch. 9 - The addition of H2 to C=C double bonds is an...Ch. 9 - Prob. 9.48SPCh. 9 - Prob. 9.49SPCh. 9 - 9.50 A reaction inside a cylindrical container...Ch. 9 - At a constant pressure of 0.905 atm, a chemical...Ch. 9 - Prob. 9.52SPCh. 9 - Prob. 9.53SPCh. 9 - Prob. 9.54SPCh. 9 - Prob. 9.55SPCh. 9 - 9.56 The explosion of 2.00 mol of solid...Ch. 9 - Prob. 9.57SPCh. 9 - Prob. 9.58SPCh. 9 - Assume that a particular reaction evolves 244 kJ...Ch. 9 - Prob. 9.60SPCh. 9 - A reaction takes place at a constant pressure of...Ch. 9 - Prob. 9.62SPCh. 9 - Indicate the direction of heat transfer between...Ch. 9 - Prob. 9.64SPCh. 9 - Prob. 9.65SPCh. 9 - Aluminum metal reacts with chlorine with a...Ch. 9 - Prob. 9.67SPCh. 9 - 9,68 How much heat in kilojoules is evolved or...Ch. 9 - 9.69 Nitromethane (CH3NO2), sometimes used as a...Ch. 9 - How much heat in kilojoules is evolved or absorbed...Ch. 9 - How much heat in kilojoules is evolved or absorbed...Ch. 9 - What is the difference between heat capacity and...Ch. 9 - Does a measurement carried out in a bomb...Ch. 9 - Sodium metal is sometimes used as a cooling agent...Ch. 9 - Titanium metal is used as a structural material in...Ch. 9 - Assuming that Coca Cola has the same specific heat...Ch. 9 - Calculate the amount of heat required to raise the...Ch. 9 - Instant cold packs used to treat athletic injuries...Ch. 9 - 9.79 Instant hot packs contain a solid and a pouch...Ch. 9 - Prob. 9.80SPCh. 9 - Prob. 9.81SPCh. 9 - 9.82 When 0.187 g of benzene, C6H6 is burned in a...Ch. 9 - Prob. 9.83SPCh. 9 - 9.84 How is the standard state of an element...Ch. 9 - Prob. 9.85SPCh. 9 - Prob. 9.86SPCh. 9 - Prob. 9.87SPCh. 9 - Prob. 9.88SPCh. 9 - Prob. 9.89SPCh. 9 - Prob. 9.90SPCh. 9 - Prob. 9.91SPCh. 9 - Write balanced equations for the formation of the...Ch. 9 - Prob. 9.93SPCh. 9 - Prob. 9.94SPCh. 9 - Prob. 9.95SPCh. 9 - Prob. 9.96SPCh. 9 - Prob. 9.97SPCh. 9 - Prob. 9.98SPCh. 9 - Prob. 9.99SPCh. 9 - Prob. 9.100SPCh. 9 - Prob. 9.101SPCh. 9 - Prob. 9.102SPCh. 9 - Prob. 9.103SPCh. 9 - Prob. 9.104SPCh. 9 - Prob. 9.105SPCh. 9 - Prob. 9.106SPCh. 9 - Prob. 9.107SPCh. 9 - Use the average bond dissociation energies in...Ch. 9 - 9.109 Use the bond dissociation energies in Table...Ch. 9 - Prob. 9.110SPCh. 9 - Calculate an approximate heat of combustion for...Ch. 9 - Prob. 9.112SPCh. 9 - Prob. 9.113SPCh. 9 - Prob. 9.114SPCh. 9 - Prob. 9.115SPCh. 9 - Prob. 9.116SPCh. 9 - Prob. 9.117SPCh. 9 - Prob. 9.118SPCh. 9 - Prob. 9.119SPCh. 9 - One of the steps in the cracking of petroleum into...Ch. 9 - The commercial production of 1,2-dichloro ethane,...Ch. 9 - Prob. 9.122SPCh. 9 - Prob. 9.123SPCh. 9 - Suppose that a reaction has H = -33 kJ and S = -58...Ch. 9 - Suppose that a reaction has H = +41 kJ and S =...Ch. 9 - Prob. 9.126SPCh. 9 - Vinyl chloride (H2C=CHCl), the starting material...Ch. 9 - Ethyl alcohol has Hfusion = 5.02 kJ/mol and melts...Ch. 9 - Chloroform has Hvaporization = 29.2 kJ/mol and...Ch. 9 - When a sample of a hydrocarbon fuel is ignited and...Ch. 9 - Used in welding metals, the reaction of acetylene...Ch. 9 - Ethyl chloride (C2H5Cl), a substance used as a...Ch. 9 - When 1.50 g of magnesium metal is allowed to react...Ch. 9 - Prob. 9.134CPCh. 9 - Find H in kilojoules for the reaction of nitric...Ch. 9 - The boiling point of a substance is defined as the...Ch. 9 - Prob. 9.137CPCh. 9 - Prob. 9.138CPCh. 9 - Prob. 9.139CPCh. 9 - Isooctane, C8H18, is the component of gasoline...Ch. 9 - We said in Section 9.1 that the potential energy...Ch. 9 - For a process to be spontaneous, the total entropy...Ch. 9 - Set up a Hess's law cycle, and use the following...Ch. 9 - A 110.0 g piece of molybdenum metal is heated to...Ch. 9 - Given 400.0 g of hot tea at 80.0 °C, what mass of...Ch. 9 - Citric acid has three dissociable hydrogens. When...Ch. 9 - Assume that 100.0 mL of 0.200 M CsOH and 50.0 mL...Ch. 9 - Imagine that you dissolve 10.0 g of a mixture of...Ch. 9 - Consider the reaction: 4CO(g)+2NO2(g)4CO2(g)+N2(g)...Ch. 9 - The reaction S8(g)4S2(g) has H = +237 kJ (a) The...Ch. 9 - Prob. 9.151MPCh. 9 - Prob. 9.152MPCh. 9 - (a) Write a balanced equation for the reaction of...Ch. 9 - Prob. 9.154MPCh. 9 - Prob. 9.155MP
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