Question

How does nuclear fusion generate energy?

   How does nuclear fusion generate energy?

Holt Chemistry

R.Thomas Myers,… 1st Edition

Chapter 4, Problem 34

Instant Answer

Solved by Expert Qiao Ruan

08/23/2019

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This collision results in the combination of the atoms to produce a new, heavier nucleus. This can be represented as: \[ A + B \rightarrow C \] Show more…

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How does nuclear fusion generate energy?

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Key Concepts

Quantum Tunneling

Quantum tunneling is a phenomenon where particles can pass through energy barriers that they would not be able to overcome classically. This effect plays a crucial role in nuclear fusion, as it allows atomic nuclei to fuse at temperatures and pressures lower than those predicted by classical physics, thereby facilitating energy generation in environments like stellar cores.

Coulomb Barrier

The Coulomb barrier is the repulsive force that exists between positively charged nuclei. To achieve fusion, the nuclei must have enough kinetic energy—typically provided by high temperatures and pressures—to overcome this electrostatic repulsion, allowing the strong nuclear force to take over and bind the nuclei together.

Mass Defect

Mass defect refers to the difference between the mass of the fully assembled nucleus and the sum of the masses of its individual nucleons. This difference in mass is converted into energy during nuclear fusion, which is a direct application of the mass–energy equivalence principle.

Binding Energy

Binding energy is the energy required to disassemble a nucleus into its individual protons and neutrons. In the context of nuclear fusion, when lighter nuclei combine to form a heavier nucleus, the binding energy per nucleon generally increases, releasing excess energy in the process as the nucleus becomes more stable.

Nuclear Fusion

Nuclear fusion is the process in which two or more atomic nuclei combine to form a heavier nucleus. This process releases energy because the mass of the resulting nucleus is less than the sum of the masses of the original nuclei, and the lost mass is converted into energy as described by Einstein's mass–energy equivalence principle (E=mc²).

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