Liquid oxygen is stored in a thin-walled spherical vessel with a diameter of 0.8 m, which is enclosed within a second thin-walled spherical vessel with a diameter of 1.2 m. The surfaces of the two spherical vessels have an emissivity of 0.05 and are separated by a void space. The surfaces of the two spherical vessels have an emissivity of 0.05 and are separated by a void space. If the outer surface is at 280 K and the inner surface is at 95 K, what is the mass flow of oxygen lost due to evaporation?

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Convective Mass Transfer between Phases

Mass transfer means the transport or movement of mass using streams, phases, components, and so on from one location to another.