Methane gas is diffusing in a straight tube 0.1 m long containing helium at 298 K and a total pressure of 1.01325 x 105 Pa. The partial pressure of CH4 at one end is 1.400 x 104 Pa and 1.33 x 103 Pa at the other end. Helium is insoluble in one boundary, and hence is non-diffusing or stagnant. The diffusivity coefficient is 0.675 x10-4 m2/s. Calculate the flux of methane in kg mol/m2s at steady state.

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Principal Quantities and EOS

A physical quantity represents the physical state of a system. It is expressed as the product of a number and unit. The basic quantities used in science are length, mass, and time. The principal quantities are the quantities that are independent of other quantities.