Part A Nuclear reactors generate power by harnessing the energy from nuclear fission. In a fission reaction, uranium-235 absorbs a neutron, bringing it into a highly unstable state as uranium-236. This state almost immediately breaks apart into two smaller fragments, releasing energy. One typical reaction is U+n-Xe+ Sr + 2,n, where n indicates a neutron. In this problem, What is the reaction energy Q of this reaction? Use c? = 931.5 MeV/u. Express your answer in megaelectron volts to three significant figures. • View Available Hint(s) assume that all fission reactions are of this kind. In fact, many different fission reactions go on inside a reactor, but all have similar reaction energies, so it is reasonable to calculate with just one. The products of this reaction are unstable and decay shortly after fission, releasing more energy. In this problem, you will ignore the extra energy contributed by these secondary decays. Q = MeV Submit You will need the following mass data: • mass of 235 U = 235.04393 u. 92 • mass of Xe = 139.92144 u, Part B 54 • mass of Sr= 93.91523 u, and • mass of n=1.008665 u. Using fission, what mass m of uranium-235 would be necessary to supply all of the energy thatt
Part A Nuclear reactors generate power by harnessing the energy from nuclear fission. In a fission reaction, uranium-235 absorbs a neutron, bringing it into a highly unstable state as uranium-236. This state almost immediately breaks apart into two smaller fragments, releasing energy. One typical reaction is U+n-Xe+ Sr + 2,n, where n indicates a neutron. In this problem, What is the reaction energy Q of this reaction? Use c? = 931.5 MeV/u. Express your answer in megaelectron volts to three significant figures. • View Available Hint(s) assume that all fission reactions are of this kind. In fact, many different fission reactions go on inside a reactor, but all have similar reaction energies, so it is reasonable to calculate with just one. The products of this reaction are unstable and decay shortly after fission, releasing more energy. In this problem, you will ignore the extra energy contributed by these secondary decays. Q = MeV Submit You will need the following mass data: • mass of 235 U = 235.04393 u. 92 • mass of Xe = 139.92144 u, Part B 54 • mass of Sr= 93.91523 u, and • mass of n=1.008665 u. Using fission, what mass m of uranium-235 would be necessary to supply all of the energy thatt
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Transcribed Image Text:Part A
Nuclear reactors generate power by harnessing the
energy from nuclear fission. In a fission reaction,
uranium-235 absorbs a neutron, bringing it into a
highly unstable state as uranium-236. This state
almost immediately breaks apart into two smaller
fragments, releasing energy. One typical reaction is
140 Xe +94 Sr + 2,n,
What is the reaction energy Q of this reaction? Use c? = 931.5 MeV/u.
Express your answer in megaelectron volts to three significant figures.
235
92
3%U+n→
• View Available Hint(s)
54
38
where in indicates a neutron. In this problem,
assume that all fission reactions are of this kind. In
Hν ΑΣφ
fact, many different fission reactions go on inside a
reactor, but all have similar reaction energies, so it
is reasonable to calculate with just one. The
products of this reaction are unstable and decay
shortly after fission, releasing more energy. In this
problem, you will ignore the extra energy
contributed by these secondary decays.
Q :
MeV
Submit
You will need the following mass data:
• mass of 235U = 235.04393 u,
92
140 Xe = 139.92144 u,
54
94
38
• mass of
Part B
• mass of Sr = 93.91523 u, and
• mass of n= 1.008665 u.
Using fission, what mass m of uranium-235 would be necessary to supply all of the energy that the United States
uses in a year, roughly 1.0 × 1019 J?
Express your answer in kilograms to two significant figures.
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