The proton-proton chain needs high temperature because
A)of the ground state energy of the hydrogen atom.
B)of the presence of helium atoms.
C)the protons must overcome the Coulomb barrier.
D)of the need for low density.
E)the neutrinos carry more energy away than the reaction produces.

Question

Quizplus · Accepted Answer

The proton-proton chain involves bringing two positively charged protons close enough together that the strong nuclear force can take effect and bind them together to form a deuterium nucleus. However, the protons repel each other due to their positive charges, creating a Coulomb barrier that must be overcome. This requires high temperatures and pressures, which are found in the cores of stars.

The Proton-Proton Chain Needs High Temperature Because