Advertisements
Advertisements
प्रश्न
Calculate the Q-value of the fusion reaction 4He + 4He = 8Be. Is such a fusion energetically favourable? Atomic mass of 8Be is 8.0053 u and that of 4He is 4.0026 u.
(Use Mass of proton mp = 1.007276 u, Mass of `""_1^1"H"` atom = 1.007825 u, Mass of neutron mn = 1.008665 u, Mass of electron = 0.0005486 u ≈ 511 keV/c2,1 u = 931 MeV/c2.)
Advertisements
उत्तर
Given:-
Atomic mass of 8Be = 8.0053 u
Atomic mass of 4He = 4.0026 u
Required Q-value = `(2 xx 4.0026 - 8.0053) c^2`
`= 0.0001 xx 931 "MeV"`
`= 0.0001 xx 931 xx 10^6 "eV"`
= 93.1 KeV
No, such reaction is not favourable.
APPEARS IN
संबंधित प्रश्न
Suppose, we think of fission of a `""_26^56"Fe"` nucleus into two equal fragments `""_13^28"Al"`. Is the fission energetically possible? Argue by working out Q of the process. Given `"m"(""_26^56 "Fe") = 55.93494 "u"` and `"m"(""_13^28 "Al") = 27.98191 "u"`.
The fission properties of `""_94^239"Pu"` are very similar to those of `""_92^235 "U"`. The average energy released per fission is 180 MeV. How much energy, in MeV, is released if all the atoms in 1 kg of pure `""_94^239 "Pu"` undergo fission?
In a typical fission reaction, the nucleus is split into two middle-weight nuclei of unequal masses. Which of the two (heavier or lighter) has greater kinetic energy? Which one has greater liner momentum?
The mass of a neutral carbon atom in ground state is
As compared to 12C atom, 14C atom has
As the mass number A increases, which of the following quantities related to a nucleus do not change?
A free neutron decays to a proton but a free proton does not decay to a neutron. This is because
Calculate the energy released by 1g of natural uranium assuming 200 MeV is released in each fission event and that the fissionable isotope 235U has an abundance of 0.7% by weight in natural uranium.
Calculate the energy that can be obtained from 1 kg of water through the fusion reaction 2H + 2H → 3H + p. Assume that 1.5 × 10−2% of natural water is heavy water D2O (by number of molecules) and all the deuterium is used for fusion.
(Use Mass of proton mp = 1.007276 u, Mass of `""_1^1"H"` atom = 1.007825 u, Mass of neutron mn = 1.008665 u, Mass of electron = 0.0005486 u ≈ 511 keV/c2,1 u = 931 MeV/c2.)
Which particle is most likely to be captured by a 235u nucleus and cause it to undergo fission?
Assuming that about 200 MeV of energy is released per fission of 92U235 nuclei, then the mass of U235 consumed per day in a fission reactor of power 1 megawatt will be approximately ______.
Distinguish between nuclear fission and fusion giving an example of each.
If in nuclear fusion process the masses of the fusing nuclei be m1 and m2 and the mass of the resultant nucleus be m3, then:
Nuclear fission is best defined as:
When \(_{92}^{235}U\) captures a bombarding neutron, the intermediate nucleus formed before it splits is:
In the neutron-induced fission of uranium-235 that produces \(_{51}^{133}Sb\) and \(_{41}^{99}Nb\) as fragments, the number of neutrons released is:
The disintegration energy released in a fission event first appears as:
The enormous energy released in an atom bomb comes from:
