ELEM PRINC CHEM (LL) W/EBOOK
4th Edition
ISBN: 9781119846772
Author: FELDER
Publisher: WILEY
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Textbook Question
Chapter 9, Problem 9.25P
Formaldehyde is produced commercially by the catalytic oxidation of methanol. In a side reaction, methanol is oxidized to CO2.
A mixture containing 55.6 mole% methanol and the balance oxygen enters a reactor at 350°C and 1 atm at a rate of 4.60 × 104L/s. The reaction products emerge at the same temperature and pressure at a rate of 6.26 × 104L/s. An analysis of the products yields a molar composition of 36.7% CH2O,4.1% CO2, 14.3% O2. and 44.9% H2O. The required reactor cooling rate is calculated to be 1.05 × 105kW.
- Is the calculated cooling rate correct for the given stream data?
- The stream data cannot be correct. Prove it.
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Problem 10.18 A 60° set-square has the shortest edge of 40 mm lying in the V.P. The surface is in-
clined to the V.P. and perpendicular to the H.P. such that the front view appears as an isosceles triangle.
Draw the projections of the set-square and determine its inclination with the V.P.
Construction Refer to Fig. 10.18.
A 60° set-square inclined to the V.P. and per-
pendicular to the H.P. can appear as an isosceles
triangle in the front view, when the shorter edge
is in the V.P.
1. First stage Draw a right angled triangle
40
a'
a'
b'
c' b'
X
40
C'
a,b
C a,b
a'b'c' keeping 40 mm long a'b' perpen-
dicular to xy. Project the corners to xy and
obtain ac as the top view.
2. Second stage Draw another right
angled triangle a'b'c' on the horizontal
locus line from points a', b' and c' of the
first stage such that length of b'c' is equal
to that of a'b'. Project a'b' to meet xy at
ab. Draw an arc with centre a and radius
equal to ac of the first stage to meet the
vertical projector of c' at…
□ 40
a'
12
o'
a
O
d'
TL = 85
D.
Problem 9.12 The top view of a line measures 60 mm.
The line is parallel to the V.P. and inclined at 45° to the H.P.
One end of the line is 25 mm in front of the V.P. and lies on
the H.P. Draw its projections and determine the true length.
Interpretation Let the line be PQ parallel to the V.P. The
front view has true length and the top view is parallel to xy.
Construction Refer to Fig. 9.12.
1. Draw a reference line xy. Mark point p' on xy and point
p 25 mm below xy.
2. Draw a 60 mm long line pq parallel to xy. This repre-
sents the top view.
3. Draw line from point p', inclined at 45° to xy to meet the
projector from point q at point q'. Join p'a' to represent
the front view. Measure length of p'a' as true length of
line PQ. Here T.L. = 85 mm.
Result True length of line PQ is p'q' = 85 mm.
5
Fig. 9.12
p
60
σ
Chapter 9 Solutions
ELEM PRINC CHEM (LL) W/EBOOK
Ch. 9 - The standard heat of the reaction...Ch. 9 - Prob. 9.2PCh. 9 - Prob. 9.3PCh. 9 - The standard heat of the reaction...Ch. 9 - Prob. 9.5PCh. 9 - Prob. 9.6PCh. 9 - Prob. 9.7PCh. 9 - Prob. 9.8PCh. 9 - The standard heat of combustion of gaseous ethane...Ch. 9 - The standard heat of combustion (AH°) of liquid...
Ch. 9 - Prob. 9.11PCh. 9 - Prob. 9.12PCh. 9 - In the production of many microelectronic devices,...Ch. 9 - Prob. 9.14PCh. 9 - Prob. 9.15PCh. 9 - Prob. 9.16PCh. 9 - Prob. 9.17PCh. 9 - Carbon monoxide at 25°C and steam at 150°C are fed...Ch. 9 - Prob. 9.19PCh. 9 - Prob. 9.20PCh. 9 - Ethyl alcohol (ethanol) can be produced by the...Ch. 9 - Prob. 9.22PCh. 9 - Prob. 9.23PCh. 9 - Prob. 9.24PCh. 9 - Formaldehyde is produced commercially by the...Ch. 9 - Prob. 9.26PCh. 9 - Prob. 9.27PCh. 9 - Prob. 9.28PCh. 9 - Prob. 9.29PCh. 9 - A gas mixture containing 85 mole% methane and the...Ch. 9 - Ethylene oxide is produced by the catalytic...Ch. 9 - Cumene (C6H5C3H7) is produced by reacting benzene...Ch. 9 - Ethylbenzene is converted to styrene in the...Ch. 9 - Prob. 9.34PCh. 9 - Prob. 9.35PCh. 9 - Prob. 9.36PCh. 9 - Prob. 9.37PCh. 9 - Coke can be converted into CO—a fuel gas—in the...Ch. 9 - Prob. 9.39PCh. 9 - Prob. 9.40PCh. 9 - Prob. 9.41PCh. 9 - The equilibrium constant for the ethane...Ch. 9 - You are checking the performance of a reactor in...Ch. 9 - Hydrogen is produced in the steam reforming of...Ch. 9 - Prob. 9.45PCh. 9 - Five cubic meters of a 1.00-molar aqueous sulfuric...Ch. 9 - Prob. 9.47PCh. 9 - Prob. 9.48PCh. 9 - Prob. 9.49PCh. 9 - Calcium chloride is a salt used in a number of...Ch. 9 - A dilute aqueous solution of sulfuric acid at 25°C...Ch. 9 - A 2.00 mole% sulfuric acid solution is neutralized...Ch. 9 - A 12.0-molar solution of sodium hydroxide (SG =...Ch. 9 - Citric acid (C6H8O7) is used in the preparation of...Ch. 9 - Ammonia scrubbing is one of many processes for...Ch. 9 - Various uses for nitric acid are given in Problem...Ch. 9 - A natural gas is analyzed and found to consist of...Ch. 9 - Prob. 9.58PCh. 9 - A fuel gas is known to contain methane, ethane,...Ch. 9 - A fuel gas containing 85.0 mole% methane and the...Ch. 9 - A mixture of air and a fine spray of gasoline at...Ch. 9 - The heating value of a fuel oil is to be measured...Ch. 9 - Methanol vapor is burned with excess air in a...Ch. 9 - Methane at 25°C is burned in a boiler furnace with...Ch. 9 - Methane is burned completely with 40% excess air....Ch. 9 - A gaseous fuel containing methane and ethane is...Ch. 9 - A coal contains 73.0 wt% C, 4.7% H (not including...Ch. 9 - A mixture of methane, ethane, and argon at 25°C is...Ch. 9 - Prob. 9.69PCh. 9 - Prob. 9.70PCh. 9 - Prob. 9.71PCh. 9 - A bituminous coal is burned with air in a boiler...Ch. 9 - Prob. 9.73PCh. 9 - A natural gas containing 82.0 mole% CH4and the...Ch. 9 - Prob. 9.75PCh. 9 - Liquid n-pentane at 25°C is burned with 30% excess...Ch. 9 - Methane is burned with 25% excess air in a...Ch. 9 - Methane and 30% excess air are to be fed to a...Ch. 9 - Prob. 9.79PCh. 9 - In Problem 9.79, the synthesis of methanol from...Ch. 9 - Natural gas that contains methane, ethane, and...Ch. 9 - Prob. 9.82PCh. 9 - The wastewater treatment plant at the Ossabaw...
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