EBK GENERAL, ORGANIC, & BIOLOGICAL CHEM
3rd Edition
ISBN: 9781259298424
Author: SMITH
Publisher: VST
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Chapter 7.3, Problem 7.3P
Interpretation Introduction
(a)
Interpretation:
The volume (L) of this helium gas is to be determined at the pressure of 5.0 atm.
Concept Introduction:
Boyle's Law- It defines the relationship between the pressure of gas and the volume of that gas at the constant temperature. According to this law, at a constant temperature, the pressure exerted by a fixed mass of the gas is inversely proportional to the volume occupied by that same mass of the gas.
Mathematically,
Interpretation Introduction
(b)
Interpretation:
The volume (L) of this helium gas is to be determined at the pressure of 2.5 atm.
Concept Introduction:
Boyle's Law- It defines the relationship between the pressure of gas and the volume of that gas at the constant temperature. According to this law, at a constant temperature, the pressure exerted by a fixed mass of the gas is inversely proportional to the volume occupied by that same mass of the gas.
Mathematically,
Interpretation Introduction
(c)
Interpretation:
The volume (L) of this helium gas is to be determined at the pressure of 10.0 atm.
Concept Introduction:
Boyle's Law- It defines the relationship between the pressure of gas and the volume of that gas at the constant temperature. According to this law, at a constant temperature, the pressure exerted by a fixed mass of the gas is inversely proportional to the volume occupied by that same mass of the gas.
Mathematically,
Interpretation Introduction
(d)
Interpretation:
The volume (L) of this helium gas is to be determined at the pressure of 380 mm Hg.
Concept Introduction:
Boyle's Law- It defines the relationship between the pressure of gas and the volume of that gas at the constant temperature. According to this law, at a constant temperature, the pressure exerted by a fixed mass of the gas is inversely proportional to the volume occupied by that same mass of the gas.
Mathematically,
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a. In the chromatogram, estimate k' for ethyl paraben. Clearly indicate what values you used for
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b. Is this a "good" value for a capacity factor? Explain.
c. What is the resolution between n-Propyl paraben and n-Butyl paraben? Again, indicate clearly
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MAU
| Methyl paraben
40
20
0
-2
Ethyl paraben n-Propyl paraben
n-Butyl paraben
App ID 22925
6
8
min
d. In Figure 4, each stationary phase shows some negative correlation between plate count
and retention factor. In other words, as k' increases, N decreases. Explain this relationship
between k' and N.
Plate Count (N)
4000
3500
2500
2000
1500
1000
Figure 4. Column efficiency (N) vs retention factor (k') for 22
nonionizable solutes on FMS (red), PGC (black), and COZ (green). 3000
Eluent compositions (acetonitrile/water, A/W) were adjusted to obtain
k' less than 15, which was achieved for most solutes as follows: FMS
(30/70 A/W), PGC (60/40), COZ (80/20). Slightly different
compositions were used for the most highly retained solutes. All
columns were 50 mm × 4.6 mm id and packed with 5 um particles,
except for COZ, which was packed with 3 um particles. All other
chromatographic conditions were constant: column length 5 cm,
column j.§. 4.6 mm, flow rate 2 mL/min, column temperature 40 °C,
and injection volume 0.5 μL
Log(k'x/K'ethylbenzene)
FMS
1.5
1.0
0.5
0.0
ཐྭ ཋ ཤྩ བྷྲ ;
500
0
5
10…
f. Predict how the van Deemter curve in Figure 7
would change if the temperature were raised
from 40 °C to 55 °C.
Figure 7. van Desmter curves in reduced coordinates for four
nitroalkane homologues (nitropropane, black; nitrobutane, red;
nitropentane, blue; and nitrohexane, green) separated on the FMS
phase. Chromatographic conditions: column dimensions 50 mm × 4.6
mm id, eluent 30/70 ACN/water, flow rates 0.2-5.0 mL/min, injection
volume 0.5 and column temperature 40 °C. No corrections to the
plate heights have been made to account for extracolumn dispersion.
Reduced Plate Height (h)
°
20
40
60
Reduced Velocity (v)
8. (2) A water sample is analyzed for traces of benzene using headspace analysis. The sample and
standard are spiked with a fixed amount of toluene as an internal standard. The following data are
obtained:
Ppb benzene
Peak area benzene
Peak area toluene
10.0
252
376
Sample
533
368
What is the concentration of benzene in the sample?
Chapter 7 Solutions
EBK GENERAL, ORGANIC, & BIOLOGICAL CHEM
Ch. 7.1 - Prob. 7.1PCh. 7.2 - Convert each pressure unit to the indicated unit....Ch. 7.3 - Prob. 7.3PCh. 7.3 - Prob. 7.4PCh. 7.3 - Prob. 7.5PCh. 7.3 - Prob. 7.6PCh. 7.3 - Prob. 7.7PCh. 7.3 - Prob. 7.8PCh. 7.3 - The pressure inside a 1.0-L balloon at 25C was 750...Ch. 7.4 - A sample of nitrogen gas contains 5.0 mol in a...
Ch. 7.4 - Prob. 7.11PCh. 7.4 - Prob. 7.12PCh. 7.5 - Prob. 7.13PCh. 7.5 - Prob. 7.14PCh. 7.6 - CO2 was added to a cylinder containing 2.5 atm of...Ch. 7.6 - Prob. 7.16PCh. 7.6 - Prob. 7.17PCh. 7.7 - Prob. 7.18PCh. 7.7 - Prob. 7.19PCh. 7.7 - Prob. 7.20PCh. 7.7 - Which species in each pair has stronger...Ch. 7.7 - Prob. 7.22PCh. 7.7 - Prob. 7.23PCh. 7.8 - Prob. 7.24PCh. 7.8 - Would you predict the surface tension of gasoline,...Ch. 7.9 - Prob. 7.26PCh. 7.10 - Prob. 7.27PCh. 7.10 - The human body is composed of about 70% water. How...Ch. 7.10 - How much energy is required to heat 28.0 g of iron...Ch. 7.10 - Prob. 7.30PCh. 7.10 - Prob. 7.31PCh. 7.10 - If the initial temperature of 120. g of ethanol is...Ch. 7.11 - Use the heat of fusion of water from Sample...Ch. 7.11 - Answer the following questions about water, which...Ch. 7.11 - Prob. 7.35PCh. 7.12 - Answer the following questions about the graph...Ch. 7.12 - How much energy (in calories) is released when...Ch. 7.12 - How much energy (in calories) is required to melt...Ch. 7 - Prob. 7.39PCh. 7 - Prob. 7.40PCh. 7 - Prob. 7.41PCh. 7 - The compressed air tank of a scuba diver reads...Ch. 7 - Assume that each of the following samples is at...Ch. 7 - Use the diagrams in Problem 7.43 to answer the...Ch. 7 - Prob. 7.45PCh. 7 - Prob. 7.46PCh. 7 - Prob. 7.47PCh. 7 - Prob. 7.48PCh. 7 - Prob. 7.49PCh. 7 - Prob. 7.50PCh. 7 - Prob. 7.51PCh. 7 - Prob. 7.52PCh. 7 - Prob. 7.53PCh. 7 - If someone takes a breath and the lungs expand...Ch. 7 - Prob. 7.55PCh. 7 - Prob. 7.56PCh. 7 - Prob. 7.57PCh. 7 - Prob. 7.58PCh. 7 - Prob. 7.59PCh. 7 - Prob. 7.60PCh. 7 - Prob. 7.61PCh. 7 - Prob. 7.62PCh. 7 - Prob. 7.63PCh. 7 - Prob. 7.64PCh. 7 - Prob. 7.65PCh. 7 - Prob. 7.66PCh. 7 - Prob. 7.67PCh. 7 - Prob. 7.68PCh. 7 - Prob. 7.69PCh. 7 - Prob. 7.70PCh. 7 - Prob. 7.71PCh. 7 - Prob. 7.72PCh. 7 - Prob. 7.73PCh. 7 - Prob. 7.74PCh. 7 - Prob. 7.75PCh. 7 - Prob. 7.76PCh. 7 - Prob. 7.77PCh. 7 - Prob. 7.78PCh. 7 - Prob. 7.79PCh. 7 - Prob. 7.80PCh. 7 - Prob. 7.81PCh. 7 - Prob. 7.82PCh. 7 - Prob. 7.83PCh. 7 - Prob. 7.84PCh. 7 - Which molecules are capable of intermolecular...Ch. 7 - Prob. 7.86PCh. 7 - Prob. 7.87PCh. 7 - Explain why the boiling point of A is higher than...Ch. 7 - Prob. 7.89PCh. 7 - Prob. 7.90PCh. 7 - Prob. 7.91PCh. 7 - Prob. 7.92PCh. 7 - Prob. 7.93PCh. 7 - Prob. 7.94PCh. 7 - Prob. 7.95PCh. 7 - Prob. 7.96PCh. 7 - Prob. 7.97PCh. 7 - Prob. 7.98PCh. 7 - Prob. 7.99PCh. 7 - How many calories of heat are needed to increase...Ch. 7 - Prob. 7.101PCh. 7 - If it takes 37.0 cal of heat to raise the...Ch. 7 - Prob. 7.103PCh. 7 - What phase change is shown in the accompanying...Ch. 7 - Prob. 7.105PCh. 7 - Which process requires more energy, melting 250 g...Ch. 7 - Consider the cooling curve drawn below a. Which...Ch. 7 - Prob. 7.108PCh. 7 - Draw the heating curve that is observed when...Ch. 7 - Prob. 7.110PCh. 7 - Use the following values to answer each part. The...Ch. 7 - Prob. 7.112PCh. 7 - If you pack a bag of potato chips for a snack on a...Ch. 7 - Prob. 7.114PCh. 7 - Prob. 7.115PCh. 7 - Prob. 7.116PCh. 7 - Prob. 7.117PCh. 7 - If a scuba diver inhales 0.50 L of air at a depth...Ch. 7 - Prob. 7.119CPCh. 7 - As we learned in Chapter 5, an automobile airbag...
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