You are responsible for the purchase of oxygen gas which, before use, will be stored at a pressure of 200 atm at 300 k in a cylindrical vessel of diameter 0.2 m and height 2 m. would you prefer that the gas behaved ideally or as a van der waals fluid? the van der waals constants for oxygen are a = 1.36 liters2 · atm· mole– 2 and b = 0.0318 liters/mole.

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)