Question

Why is a very high temperature required for the process of nuclear fusion? State the approximate temperature required.

Answer 1

Nuclear fusion is not possible at room temperature and ordinary pressure.
When two positively charged nuclei approach each other, the electrostatic force of repulsion between them becomes too strong that they do not fuse. To make the fusion possible, very high temperature and pressure is required. At such a high temperature, both nuclei acquire sufficient kinetic energy to overcome
repulsive electrostatic force between them. Thus, they get fused easily at high temperatures.
Nuclear fusion takes place at very high temperatures of the order of ${10}^{7}K$.