how is nuclear energy released from fusions?(why)?

Answer 1

nuclear fusion, energy is released when the nuclei of atoms are combined or fused together. This is how the sun produces energy

Answer 2

Lets take the sun as an example.
Basically the sun fuses 4 hydrogen atoms (4 protons) into one helium atom (2 protons, 2 neutrons). But when that happens, there is a small loss of mass that is equivalent to a large amount of energy based on Einstein's e=mc^2 equation. The mass comes from 2 of the protons becoming 2 neutrons - neutrons are just slightly less massive than protons.

For more details on nuclear fusion, you need to do some reading - it's a rather complex subject that can't be explained here easily.

Answer 3

Energy is released from a fusion reaction by the conversion of mass to energy. The famous equation of E = mc^2 shows how much energy is contained in matter.

For a fusion reaction like what we have in our sun is caused by 2 deuterium atoms being slammed together hard enough that the nuclei fuse together and form a helium atom.

Now the amount of mass lost in the process is about .07% of the total mass of the 2 nuclei that are being fused. The atomic weight of deuterium is approximately 2 amu's, while the atomic weight of helium is just slightly less than 4 amu's.

This mass is converted to energy and from the E = mc^2 formula it shows how much energy is released in that reaction. The sun is basically one giant ongoing thermonuclear blast, it's sustaining itself because it hasn't exhausted its fuel supply.

It hasn't expanded its size because of the pull of gravity trying to make it shrink in size, while the energy being released from the furnace in the center of the sun is trying to make it explode outward, creating a very delicate balancing act.

Answer 4

Deuterium is the second isotope of hydrogen. Its nucleus contains 1 proton and 1 neutron. Helium nuclei contain 2 protons and 2 neutrons.

You might think that two deuterium nuclei have the same mass as one helium nucleus, but this turns out not to be the case. In fact, the helium nucleus is slightly less massive than the two deuterium nuclei. So, when two deuterium nuclei fuse (in nuclear fusion in the Sun, for example), a helium nucleus is formed, but a small amount of mass simply disappears.

Where does it go? Well, according to Einstein's famous equation
E = m*c^2
the mass is converted into energy. The energy manifests itself in the form of released photons, and increased vibrational energy.

Answer 5

In fusion there is a tiny amount of matter that is changed to energy, according to Einsteins' formula. E=mc^2

The energy is released as heat.

Answer 6

Find out at the link below ;);)

Answer 7

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