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Science
Chemistry
Nuclear Chemistry
#7 OVERVIEW OF NUCLEAR ENERGY
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Gravity
SCIENCE CSET 1
Terms in this set (63)
Define energy
the ability to do work
Define work
the movement of something when an effort is applied
The light from the sun is what type of energy?
Nuclear energy
What is nuclear energy?
Energy created from nuclear reactions.
What are nuclear reactions?
Reactions in which atomic nuclei are changed.
What are atoms?
The smallest building blocks of matter
What is matter?
Anything that has mass & takes up space.
What happens to an atom that undergoes a nuclear reaction?
It changes the nucleus of an atom. Either the protons or the neutrons will change. The process to change the nucleus releases a large amount of energy
How many types of nuclear reactions are there?
2 types 1.fission 2. Fusion
What is fission?
When large nuclei are split into smaller fragments. This is 1 of 2 types of nuclear reactions.
What is fusion?
.when small nuclei are put together to make a bigger one. This is the 2nd type of nuclear reaction.
What do we harness in a nuclear plant from nuclear fission?
It is used to generate electricity.
Which generates more energy, fusion or fission?
Fusion does.
Which element is used to provide nuclear energy for nuclear power plants?
Helium
What is nuclear fission?
The process in which a large nucleus splits into two smaller nuclei with the release of energy.
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Verified questions
CHEMISTRY
(a) Calculate the vibrational partition function of $\mathrm{CS}_{2}$ at 500 K given the wavenumbers $658 \mathrm{cm}^{-1}$ (symmetric stretch), $397 \mathrm{cm}^{-1},$ (bendi, doubly degenerate), $1535 \mathrm{cm}^{-1}$ (asymmetric stretch). (b) Calculate the vibrational partition function of HCN at 900 K given the wavenumbers $331 \mathrm{lcm}^{-1}$ (symmetric stretch), $712 \mathrm{cm}^{-1}$ (bend, doubly degenerate), $2097 \mathrm{cm}^{-1}$ (asymmetric stretch).
CHEMISTRY
Which compound in each of the following pairs would you expect to have the greater dipole moment $\mu$? Why? (a) HF or HCl (d) $\mathrm{CHCl}_{3} \text { or } \mathrm{CCl}_{3} \mathrm{F}$ (b) HF or $\mathrm{BF}_{3}$ (e) $\mathrm{CH}_{3} \mathrm{NH}_{2} \text { or } \mathrm{CH}_{3} \mathrm{OH}$ (c) $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CH} \text { or }\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CCl}$ (f) $\mathrm{CH}_{3} \mathrm{NH}_{2} \text { or } \mathrm{CH}_{3} \mathrm{NO}_{2}$
CHEMISTRY
(a) An oxygen molecule absorbs ultraviolet radiation in a transition from its $^{3}\Sigma_{g} ^{-}$ ground electronic state to an excited state that is energetically close to a dissociative $^{3}\Pi_{11}$ state. The absorption band has a relatively large experimental linewidth. Account for this observation. (b) A hydrogen molecule absorbs ultraviolet radiation in a transition from its $^{3} \Sigma _{6}^{-}$ ground electronic state to an excited state that is energetically close to a dissociative $^{1}\Sigma _{10}^{+}$ state. The absorption band has a relatively large experimental linewidth. Account for this observation.
CHEMISTRY
Which process occurs in a controlled fusion reaction? (1) Light nuclei collide to produce heavier nuclei. (2) Heavy nuclei collide to produce lighter nuclei. (3) Neutron bombardment splits light nuclei. (4) Neutron bombardment splits heavy nuclei.
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