A spherical tank is being designed to hold 7 moles of methane gas at a pressure of 8 bar and a temperature of 50oF. Determine the volume of the spherical tank to be used.
(a) Calculate the weight of methane in the tank in kg
(b) Find an expression for V in terms of m, R, T and P
(c) Calculate the value of V in ft^3
(d) What diameter spherical tank should be used in ft