First we need to know how the mass of hell is changing in time. So we need to know the rate that souls are moving into Hell and the rate they are leaving, I think we can safely assume that once a soul gets to hell it will not leave. Therefore, no souls are leaving.
                As for how many souls are entering Hell, lets look at the different religions that exist in the world today. Some of these religions state that if you are not a member of their religion, you will go to Hell.
Since there are more than one of these religions and since people do not belong to more than one religion, we can project that all souls go to Hell.
               
 
 
First we need to know how the mass of hell is changing in time. So we need to know the rate that souls are moving into Hell and the rate they are leaving, I think we can safely assume that once a soul gets to hell it will not leave. Therefore, no souls are leaving.
                As for how many souls are entering Hell, lets look at the different religions that exist in the world today. Some of these religions state that if you are not a member of their religion, you will go to Hell.
Since there are more than one of these religions and since people do not belong to more than one religion, we can project that all souls go to Hell.
                With birth and death rates as they are, we can expect the number of souls in Hell to increase exponentially. Now, we look at the rate of exchange of the volume in Hell because Boyle’s law states that in order of the temperature and pressure in Hell to stay the same, the volume of Hell has to expand proportionately as souls are added.