EBK NUMERICAL METHODS FOR ENGINEERS
7th Edition
ISBN: 9780100254145
Author: Chapra
Publisher: YUZU
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Chapter 12, Problem 3P
Chemical/Bio Engineering
Because the system shown in Fig. 12.3 is at steady state, what can be said regarding the four flows:
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Problem 2.
Fluid circulates steadily through four devices in a
power plant as shown in the sketch. Mass flow
rates and enthalpies per unit mass are tabulated for
some of the states. Heat- and work-interaction
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Complete the following tables:
h
State (kg/s) (J/kg)
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(W)
(W)
A
D
B
1
15
A.
150
2
13
30
3
25
C
3.
4.
5
Q\. The first law of thermodynamics involves three main components, if we
know the behavior of two components, estimate the behavior of the third
component. ( Conclusion ) :
a. If heat is added to the system, then the internal energy of the system
increases.
..... ..
b. If heat leaves the system, then the internal energy of the system
decreases ....
c. If the work is done by the system, then the internal energy of the system
decreases ...
.......
d. If the work is done on the system, then the internal energy of the system
increases..
.......
3. Laws on Conservation. Using the energy model sketched below plus concepts of energy
conservation, consider the impact of a dirty war on the global energy. To start, assume that the
impact of this war has created an atmosphere that absorbs 75% of the incoming sunlight, while
the albedo is reduced to nearly 20%. Let's assume that Earth's ability to reflect incoming solar
radiation is negligible. The Earth's surface radiates 240 W/m2, all of which is absorbed by the
atmosphere. Assuming that Earth can be modeled as a blackbody emitter and incoming/outgoing
energy as shown in the schematic, find the following quantities:
a) The "nuclear winter" temperature [°C] of the surface of the Earth
b) X, the rate [W/m²] at which radiation is emitted from the atmosphere to space
c) Y, the rate [W/m²] of absorption of short-wavelength solar radiation at the Earth's surface
d) Z, the rate [W/m2] at which the atmosphere radiates energy to the Earth's surface
Incoming 342 W/m²
Reflected to space X…
Chapter 12 Solutions
EBK NUMERICAL METHODS FOR ENGINEERS
Ch. 12 - Chemical/Bio Engineering
12.1 Perform the same...Ch. 12 - Chemical/Bio Engineering If the input to reactor 3...Ch. 12 - Chemical/Bio Engineering Because the system shown...Ch. 12 - Chemical/Bio Engineering
12.4 Recompute the...Ch. 12 - Chemical/Bio Engineering Solve the same system as...Ch. 12 - Chemical/Bio Engineering
12.6 Figure P12.6 shows...Ch. 12 - Chemical/Bio Engineering
12.7 Employing the same...Ch. 12 - Chemical/Bio Engineering The Lower Colorado River...Ch. 12 - Chemical/Bio Engineering A stage extraction...Ch. 12 - Chemical/Bio Engineering
12.10 An irreversible,...
Ch. 12 - Chemical/Bio Engineering
12.11 A peristaltic pump...Ch. 12 - Chemical/Bio Engineering
12.12 Figure P12.12...Ch. 12 - Civil/Environmental Engineering A civil engineer...Ch. 12 - Civil/Environmental Engineering Perform the same...Ch. 12 - Civil/Environmental Engineering
12.15 Perform the...Ch. 12 - Civil/Environmental Engineering Calculate the...Ch. 12 - Civil/Environmental Engineering In the example for...Ch. 12 - Civil/Environmental Engineering Employing the same...Ch. 12 - Civil/Environmental Engineering Solve for the...Ch. 12 - Prob. 20PCh. 12 - Prob. 21PCh. 12 - Civil/Environmental Engineering
12.22 A truss is...Ch. 12 - Electrical Engineering
12.23 Perform the same...Ch. 12 - Electrical Engineering Perform the same...Ch. 12 - Electrical Engineering
12.25 Solve the circuit in...Ch. 12 - Electrical Engineering
12.26 An electrical...Ch. 12 - Electrical Engineering
12.27 Determine the...Ch. 12 - Electrical Engineering Determine the currents for...Ch. 12 - Electrical Engineering The following system of...Ch. 12 - Electrical Engineering
12.30 The following system...Ch. 12 - Mechanical/Aerospace Engineering Perform the same...Ch. 12 - Mechanical/Aerospace Engineering
12.32 Perform the...Ch. 12 - Mechanical/Aerospace Engineering
12.33 Idealized...Ch. 12 - Mechanical/Aerospace Engineering Three blocks are...Ch. 12 - Mechanical/Aerospace Engineering Perform a...Ch. 12 - Mechanical/Aerospace Engineering Perform the same...Ch. 12 - Mechanical/Aerospace Engineering
12.37 Consider...Ch. 12 - Mechanical/Aerospace Engineering The steady-state...Ch. 12 - Mechanical/Aerospace Engineering
12.40 A rod on a...
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