WebAssign for Zumdahl/Zumdahl/DeCoste's Chemistry, 10th Edition [Instant Access], Single-Term
10th Edition
ISBN: 9781337909969
Author: Zumdahl; Steven S.
Publisher: Cengage Learning US
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Chapter 12, Problem 78E
Interpretation Introduction
Interpretation: It is given that, the instability of long chains of silicon atoms play a very important role in its decomposition. The reason of the fact that, the similar mechanism not be expected to play a very important role in the decomposition of long chains of carbon atoms is to be stated.
Concept introduction: The linkage of atoms through covalent bond to form longer chains and structures is known as catenation.
To determine: The reason of the fact that, the similar mechanism (as of silicon) not be expected to play a very important role in the decomposition of long chains of carbon atoms.
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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
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큰 20
15
90
0+
1500
100
75
550
01
02
594
05
μ(cm/sec)
30
15
10
Chapter 12 Solutions
WebAssign for Zumdahl/Zumdahl/DeCoste's Chemistry, 10th Edition [Instant Access], Single-Term
Ch. 12 - Define reaction rate. Distinguish between the...Ch. 12 - Distinguish between the differential rate law and...Ch. 12 - One experimental procedure that can be used to...Ch. 12 - The initial rate for a reaction is equal to the...Ch. 12 - Consider the zero-, first-, and second-order...Ch. 12 - Derive expressions for the half-life of zero-,...Ch. 12 - Prob. 7RQCh. 12 - What two requirements must be met to call a...Ch. 12 - Prob. 9RQCh. 12 - Give the Arrhenius equation. Take the natural log...
Ch. 12 - Why does a catalyst increase the rate of a...Ch. 12 - Define stability from both a kinetic and...Ch. 12 - Describe at least two experiments you could...Ch. 12 - Make a graph of [A] versus time for zero-, first-,...Ch. 12 - How does temperature affect k, the rate constant?...Ch. 12 - Consider the following statements: In general, the...Ch. 12 - For the reaction A+BC, explain at least two ways...Ch. 12 - A friend of yours states, A balanced equation...Ch. 12 - Provide a conceptual rationale for the differences...Ch. 12 - The rate constant (k) depends on which of the...Ch. 12 - Table 11-2 illustrates how the average rate of a...Ch. 12 - The rate law for a reaction can be determined only...Ch. 12 - The plot below shows the number of collisions with...Ch. 12 - For the reaction O2(g)+2NO(g)2NO2(g) the observed...Ch. 12 - Each of the statements given below is false....Ch. 12 - Define what is meant by unimolecular and...Ch. 12 - The type of rate law for a reaction, either the...Ch. 12 - The initial rate of a reaction doubles as the...Ch. 12 - Hydrogen reacts explosively with oxygen. However,...Ch. 12 - The central idea of the collision model is that...Ch. 12 - Consider the following energy plots for a chemical...Ch. 12 - Prob. 21QCh. 12 - Prob. 22QCh. 12 - The combustion of carbohydrates and the combustion...Ch. 12 - Would the slope of a ln(k) versus 1/T plot (with...Ch. 12 - Consider the reaction 4PH3(g)P4(g)+6H2(g) If, in a...Ch. 12 - In the Haber process for the production of...Ch. 12 - At 40C, H2O2 (aq) will decompose according to the...Ch. 12 - Consider the general reaction aA+bBcC and the...Ch. 12 - What are the units for each of the following if...Ch. 12 - The rate law for the reaction...Ch. 12 - The reaction 2NO(g)+Cl2(g)2NOCl(g) was studied at...Ch. 12 - The reaction 2I-(aq)+S2O82-(aq)I2(aq)+2SO42-(aq)...Ch. 12 - The decomposition of nitrosyl chloride was...Ch. 12 - The following data were obtained for the gas-phase...Ch. 12 - The reaction I(aq)+OCl(aq)IO(aq)+Cl(aq) was...Ch. 12 - The reaction 2NO(g)+O2(g)2NO2(g) was studied. and...Ch. 12 - The rote of the reaction between hemoglobin (Hb)...Ch. 12 - The following data were obtained for the reaction...Ch. 12 - The decomposition of hydrogen peroxide was...Ch. 12 - A certain reaction has the following general form:...Ch. 12 - The rate of the reaction NO2(g)+CO(g)NO(g)+CO2(g)...Ch. 12 - A certain reaction has the following general form:...Ch. 12 - The decomposition of ethanol (C2H5OH) on an...Ch. 12 - At 500 K in the presence of a copper surface,...Ch. 12 - The dimerization of butadiene 2C4H6(g)C8H12(g) was...Ch. 12 - The rate of the reaction O(g)+NO2(g)NO(g)+O2(g)...Ch. 12 - Experimental data for the reaction A2B+C have been...Ch. 12 - Prob. 48ECh. 12 - The reaction AB+C is known to be zero order in A...Ch. 12 - The decomposition of hydrogen iodide on finely...Ch. 12 - Prob. 51ECh. 12 - A first-order reaction is 75.0% complete in 320....Ch. 12 - The rate law for the decomposition of phosphine...Ch. 12 - DDT (molar mass = 354.49 g/mol) was a widely used...Ch. 12 - The rate law for the reaction...Ch. 12 - Prob. 57ECh. 12 - Theophylline is a pharmaceutical drug that is...Ch. 12 - You and a coworker have developed a molecule...Ch. 12 - Consider the hypothetical reaction A+B+2C2D+3E...Ch. 12 - Write the rate laws for the following elementary...Ch. 12 - A possible mechanism for the decomposition of...Ch. 12 - A proposed mechanism for a reaction is...Ch. 12 - The mechanism for the gas-phase reaction of...Ch. 12 - Is the mechanism NO+Cl2l1NOCl2NOCl2+NOl22NOCl...Ch. 12 - The reaction 2NO(g) + O2(g) 2NO2(g) exhibits the...Ch. 12 - For the following reaction profile, indicate a....Ch. 12 - Draw a rough sketch of the energy profile for each...Ch. 12 - The activation energy for the reaction...Ch. 12 - The activation energy for some reaction...Ch. 12 - The rate constant for the gas-phase decomposition...Ch. 12 - The reaction (CH3)3CBr+OH(CH3)3COH+Br in a certain...Ch. 12 - The activation energy for the decomposition of...Ch. 12 - A first-order reaction has rate constants of 4.6 ...Ch. 12 - A certain reaction has an activation energy of...Ch. 12 - Prob. 76ECh. 12 - Which of the following reactions would you expect...Ch. 12 - Prob. 78ECh. 12 - One mechanism for the destruction of ozone in the...Ch. 12 - One of the concerns about the use of Freons is...Ch. 12 - Assuming that the mechanism for the hydrogenation...Ch. 12 - The decomposition of NH3 to N2 and H2 was studied...Ch. 12 - The decomposition of many substances on the...Ch. 12 - Prob. 84ECh. 12 - A popular chemical demonstration is the magic...Ch. 12 - Prob. 86ECh. 12 - Consider the following representation of the...Ch. 12 - The reaction H2SeO3(aq) + 6I-(aq) + 4H+(aq) Se(s)...Ch. 12 - Consider two reaction vessels, one containing A...Ch. 12 - Sulfuryl chloride (SO2Cl2) decomposes to sulfur...Ch. 12 - For the reaction 2N2O5(g)4NO2(g)+O2(g) the...Ch. 12 - Experimental values for the temperature dependence...Ch. 12 - At 620. K butadiene dimerizes at a moderate rate....Ch. 12 - For a first order gas phase reaction A products,...Ch. 12 - Cobra venom helps the snake secure food by binding...Ch. 12 - Iodomethane (CH3I) is a commonly used reagent in...Ch. 12 - Experiments during a recent summer on a number of...Ch. 12 - The activation energy of a certain uncatalyzed...Ch. 12 - Consider the following initial rate data for the...Ch. 12 - Consider a hypothetical reaction between A and B:...Ch. 12 - Consider the reaction 3A+B+CD+E where the rate law...Ch. 12 - The thiosulfate ion (S2O32) is oxidized by iodine...Ch. 12 - The reaction A(aq)+B(aq)products(aq) was studied,...Ch. 12 - A certain substance, initially present at 0.0800...Ch. 12 - A reaction of the form aAProducts gives a plot of...Ch. 12 - A certain reaction has the form aAProducts At a...Ch. 12 - Which of the following statement(s) is( are) true?...Ch. 12 - Consider the hypothetical reaction A2(g) + B2(g) ...Ch. 12 - Experiments have shown that the average frequency...Ch. 12 - Consider a reaction of the type aA products, in...Ch. 12 - A study was made of the effect of the hydroxide...Ch. 12 - Two isomers (A and B) of a given compound dimerize...Ch. 12 - The reaction NO(g)+O3NO2(g)+O2(g) was studied by...Ch. 12 - Prob. 114CPCh. 12 - In the gas phase, the production of phosgene from...Ch. 12 - Most reactions occur by a series of steps. The...Ch. 12 - You are studying the kinetics of the reaction...Ch. 12 - The decomposition of NO2(g) occurs by the...Ch. 12 - The following data were collected in two studies...Ch. 12 - Consider the following hypothetical data collected...Ch. 12 - Consider the hypothetical reaction A+B+2C2D+3E In...Ch. 12 - Hydrogen peroxide and the iodide ion react in...Ch. 12 - Sulfuryl chloride undergoes first-order...Ch. 12 - Upon dissolving InCl(s) in HCl, In+(aq) undergoes...Ch. 12 - The decomposition of iodoethane in the gas phase...Ch. 12 - Consider the following reaction: CH3X+YCH3Y+X At...
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