Question

A 5 m3 tank farm gas storage tank contains methane. The initial
temperature and pressure are P = 1 bar, T = 18 0C. The PVT
properties of methane can be described by van der Waals equation of
state

For methane Pc = 45.8 atm and Tc =190.7 K. Calculate the T and P
following each of the successive steps.

(a) 1 m3 (at standard conditions) is withdrawn isothermally.

(b) The sun warms the tank to 40 0C.

(c) 1.2 m3 (at standard conditions) is added to the tank and the
final temperature is 350C.

(d) The tank cools overnight to 18 0C.

Answer #1

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