Proton-Proton Chain (Solar Fusion)

41H → 4He + 2e+ + 2νe + energy

Visão geral

The proton-proton chain converts four hydrogen nuclei into one helium-4 nucleus, two positrons, and two electron neutrinos in a multi-step process. This reaction powers the sun and most main-sequence stars, releasing 26.7 MeV per helium nucleus. The sun converts 600 million tonnes of hydrogen to helium every second.

Participantes

Papel Substância Coeficiente Estado
Reagente Hydrogen H 4 (g)
Produto Helium He 1 (g)

Exemplo do cotidiano

All sunlight, and therefore virtually all life on Earth, is powered by this fusion reaction occurring in the sun's core at 15 million degrees.

Importância industrial

Compreender a nucleossíntese estelar é fundamental para a astrofísica e ajuda a orientar o design de reatores de fusão terrestres.

Propriedades

Tipo
Nuclear
Reversível
Não
Energia
Exotérmico
ΔH
-2520000000,0 kJ/mol

Reações relacionadas

Alpha Decay of Radon-222 Neutron Capture by Uranium-238 Beta Decay of Strontium-90 Beta Decay of Cobalt-60 Beta Decay of Carbon-14 Uranium-235 Fission Positron Emission of Carbon-11 Positron Emission of Fluorine-18 (PET Scan) Technetium-99m Gamma Decay Alpha Decay of Radium-226

Frequently Asked Questions

What is the equation for Proton-Proton Chain (Solar Fusion)?
The balanced equation is: 4¹H → ⁴He + 2e⁺ + 2νₑ + energy.
What type of reaction is Proton-Proton Chain (Solar Fusion)?
Proton-Proton Chain (Solar Fusion) is a nuclear reaction.
Is Proton-Proton Chain (Solar Fusion) exothermic or endothermic?
Proton-Proton Chain (Solar Fusion) is exothermic (releases energy). The enthalpy change (ΔH) is -2520000000.0 kJ/mol.