- #1

LCSphysicist

- 646

- 161

- Homework Statement
- Find the temperature of totally ionized hydrogen plasma

of density p = 0.10 g/cm^ at which the thermal radiation pressure

is equal to the gas kinetic pressure of the particles of plasma. Take

into account that the thermal radiation pressure p = u/3, where u

is the space density of radiation energy, and at high temperatures all

substances obey the equation of state of an ideal gas.

- Relevant Equations
- .

The image above is the solution posted by the book. I can follow the reasoning that has been used, but i have a trouble particularly at the first equation itself.

Why should $$n = 2 \rho / m_{H} $$ instead of $$n = \rho / (2m_{H})$$, since the mass os a molecule of hydrogen is two times the hydrogen/proton mass?