Physics of Everyday Phenomena
9th Edition
ISBN: 9781259894008
Author: W. Thomas Griffith, Juliet Brosing Professor
Publisher: McGraw-Hill Education
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Chapter 18, Problem 3CQ
To determine
Whether all products of burning are solid substances that can be easily weighed.
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a) For each of the following nuclear equations, state the atomic number, mass number, and symbol X of the missing reactants or products.
i. He +Au
→ 4X +?H
197
A =
Z =
X:
ii. in +Ba
→ 4X +y
56
A =
Z =
X:
iii. 137CS
Ba +4X+7
55
56
A =
Z =
X:
iv. in +X → P +H
A =
Z =
X:
v. 210BI
83
81
A =
Z =
X:
b) Choose the correct symbol for the missing particle in the following equation:
Na - Ne +9e+
11
10
238 U has a natural abundance of 99.3% and 235 U has an abundance of 0.7%. It is the rarer
235 U that is needed for nuclear reactors. The isotopes are separated by forming uranium
*UF6 and diffuses slightly faster. Many repetitions of this procedure gradually
Uranium has two naturally occurring isotopes.
235
238
hexafluoride UF6, which is a gas, then allowing it to diffuse through a series of porous membranes. UF6 has a slightly larger rms speed than
235 UF6 to that of
238 UF6?
separate the two isotopes. What is the ratio of the rms speed of
Express your answer to five significant figures.
ΑΣφ
?
1. For a Solid Oxide Fuel Cell that uses hydrogen as fuel, calculate the maximum energy
output possible at 800°C.
2. For a methanol fuel cell with total reaction equation and AG given, calculate the open
circuit voltage.
CH;OH + 3/2 O2
2H2O + CO2
AG = -698.2 kJ/mol
3. H2O is electrolyzed using an SOEC reactor. Inlet of the cathode has 30ml/min H20,
outlet of anode has 5ml/min O2, and applied current is 2A. Calculate the H2O conversion
and Faradaic efficiency (both in %). (Flow rates are given for gas phase in STP)
Chapter 18 Solutions
Physics of Everyday Phenomena
Ch. 18 - Prob. 1CQCh. 18 - Prob. 2CQCh. 18 - Prob. 3CQCh. 18 - Prob. 4CQCh. 18 - Prob. 5CQCh. 18 - Prob. 6CQCh. 18 - Prob. 7CQCh. 18 - Prob. 8CQCh. 18 - Prob. 9CQCh. 18 - Prob. 10CQ
Ch. 18 - Prob. 11CQCh. 18 - Prob. 12CQCh. 18 - Prob. 13CQCh. 18 - Prob. 14CQCh. 18 - Prob. 15CQCh. 18 - Prob. 16CQCh. 18 - Prob. 17CQCh. 18 - Prob. 18CQCh. 18 - Prob. 19CQCh. 18 - Prob. 20CQCh. 18 - Prob. 21CQCh. 18 - Prob. 22CQCh. 18 - Prob. 23CQCh. 18 - Prob. 24CQCh. 18 - Prob. 25CQCh. 18 - Prob. 26CQCh. 18 - Prob. 27CQCh. 18 - Prob. 28CQCh. 18 - Prob. 29CQCh. 18 - Prob. 30CQCh. 18 - Prob. 31CQCh. 18 - Prob. 32CQCh. 18 - Prob. 33CQCh. 18 - Prob. 34CQCh. 18 - Prob. 35CQCh. 18 - Prob. 1ECh. 18 - Prob. 2ECh. 18 - If 112 g of silicon (Si) react completely with 64...Ch. 18 - Prob. 4ECh. 18 - Prob. 5ECh. 18 - How many electrons would be required to produce 12...Ch. 18 - Prob. 7ECh. 18 - Prob. 8ECh. 18 - Prob. 9ECh. 18 - Prob. 10ECh. 18 - Prob. 11ECh. 18 - Prob. 12ECh. 18 - An electron beam in a cathode-ray tube passes...Ch. 18 - Prob. 2SPCh. 18 - Prob. 3SPCh. 18 - Prob. 4SP
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- An old campfire is uncovered during an archaeological dig. Its charcoal is found to contain less than 1.1000 the normal amount of 14C. Estimate the minimum age of the charcoal, noting that 210 = 1024.arrow_forwardCalculate the threshold energy for the following reactings: (i) n+Th²³2 → Th²³1 + 2n (ii)n+Th232 → Th²33 + yarrow_forward61.) While researching for her class presentation, karen has read that natural occuring Gallium consists of 60% Ga (atomic mass=68.911) and 40 % of Ga(atomic mas= 70.9311). What is the average atomic mass of Ga?arrow_forward
- A nuclear reaction of significant historical note occurred in 1932, when a beryllium target was bombarded with alpha particles. Analysis of the experiment indicated that the following reaction occurred: 12, He + Be → C+? What is missing in this reaction? 1. None of these 2. Y 3. e 4. de õe 5. 6. narrow_forwardDetermine the resultant reactions at A and B. (ANS: RA = 18.03kN, 33.69° N of E and RB = 33.54kN) 3m MATHalino.com Figure P-351 40 KN 1m Barrow_forward4. A reactor is being designed for a new wastewater treatment plant. The effluent BOD is not allowed to be higher than 20 mg/L, does the reactor meet this requirement? R = -K (BOD) Reactor Q= 200 m/s V= 1000m K = 0.251 BOD = 200 mg/L Q = 200 m/s %3D BOD = 100 mg/L %3Darrow_forward
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- (a) Write the complete reaction equation for electron capture by 15O. (b) Calculate the energy released.arrow_forwardUnreasonable Results The relatively scarce naturally occurring calcium isotope 48Ca has a halflife at about 21016y. (a) A small sample of this isotope is labeled as having an activity of 1.0 Ci. What is the mass of the 48Ca in the sample? (b) What is unreasonable about this result? (c) What assumption is responsible?arrow_forwardData from the appendices and the periodic table may be needed for these problems. 44. An old camp?re is uncovered during an archaeological dig. Its charcoal is found to contain less than 1/1000 the normal amount of 14C. Estimate the minimum age at the charcoal, noting that 210 = 1024.arrow_forward
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