Question:
A glass contains pores that are 1μm in diameter and are filled with N2 at 0.8 atm pressure. If the surface tension of the glass is 28 Pa and the relative density is 0.85, what will the pore size be when the gas pressure just balances the pressure due to the surface tension?
Repeat this calculation for pores that are 0.1 μm and 10 μm in diameter and discuss the changes.