# What percent of the sun’s energy comes from the fusion of hydrogen into helium?

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Deuterium/proton fusion into helium-3 accounts for 40% of the reactions by number, releasing 5.49 MeV of energy for each reaction: 39.5% of the Sun’s total energy.

## What percentage of hydrogen and helium make up the Sun?

The sun is mostly composed of the elements hydrogen (H) and helium (He). By mass the composition of the sun is 75 percent hydrogen and 25 percent helium. Various metals make up less than 0.1 percent of the mass of the sun. The temperature of the sun’s surface is about 10,340 degrees Fahrenheit (5,726 degrees Celsius).

## Does the Sun produce energy by fusing hydrogen into helium?

The Sun is a main-sequence star, and thus generates its energy by nuclear fusion of hydrogen nuclei into helium. In its core, the Sun fuses 500 million metric tons of hydrogen each second.

## How much energy is produced from fusion of helium nucleus?

A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about 3.6 × 1011 kJ of energy per mole of He42 produced.

## Can you turn hydrogen into helium?

In the core of the Sun hydrogen is being converted into helium. This is called nuclear fusion. It takes four hydrogen atoms to fuse into each helium atom. During the process some of the mass is converted into energy.

## Is the Sun hot enough for fusion?

Fusion requires temperatures of about 100 million Kelvin (approximately six times hotter than the sun’s core). At these temperatures, hydrogen is a plasma, not a gas. Plasma is a high-energy state of matter in which all the electrons are stripped from atoms and move freely about.

## Is the corona hotter or colder than the photosphere?

Edlén and Grotrian’s finding that the sun’s corona is so much hotter than the photosphere – despite being further from the sun’s core, its ultimate source of energy – has led to much head-scratching in the scientific community.

## Why does the Sun not explode like a hydrogen bomb?

The Sun is powered by the energy released when the nuclei of its hydrogen atoms slam together so hard they fuse together. … But such conditions exist only in the Sun’s intensely hot, dense core, which makes up barely 1 per cent of its total volume.

## Will our sun fuse helium?

For about a billion years, the sun will burn as a red giant. Then, the hydrogen in that outer core will deplete, leaving an abundance of helium. That element will then fuse into heavier elements, like oxygen and carbon, in reactions that don’t emit as much energy.

## How much energy is released when two hydrogens fuse?

hydrogen + hydrogen + hydrogen + hydrogen = helium + energy So every time you fuse 4 hydrogen atoms together to make helium, 26.7 MeV is released.

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