Proton-Proton Chain (Solar Fusion)

41H → 4He + 2e+ + 2νe + energy

概要

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.

参加者

役割 物質 係数 状態
反応物 Hydrogen H 4 (g)
生成物 Helium He 1 (g)

日常の例

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.

産業上の重要性

恒星内元素合成の理解は天体物理学の基礎であり、地上の核融合炉の設計指針にもなっている。

特性

タイプ
Nuclear
可逆的
いいえ
エネルギー
発熱性
ΔH
-2520000000.0 kJ/mol

関連する反応

Alpha Decay of Radium-226 Alpha Decay of Radon-222 Alpha Decay of Thorium-232 Neutron Capture by Uranium-238 Beta Decay of Iodine-131 Beta Decay of Strontium-90 Alpha Decay of Polonium-210 Americium-241 Alpha Decay Beta Decay of Cobalt-60 Electron Capture by Beryllium-7

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.