Liquid oxygen is stored in a thin-walled, spherical container 0.8 m in diameter, which is enclosed within a second thin-

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Liquid Oxygen Is Stored In A Thin Walled Spherical Container 0 8 M In Diameter Which Is Enclosed Within A Second Thin 1 (27.25 KiB) Viewed 23 times

Liquid oxygen is stored in a thin-walled, spherical container 0.8 m in diameter, which is enclosed within a second thin-walled, spherical container 1.2 m in diameter. The opaque, diffuse, gray container surfaces have an emissivity of 0.05 and are separated by an evacuated space. If the outer surface is at 270 K and the inner surface is at 95 K, what is the mass rate of oxygen lost due to evaporation, in kg/s? (The latent heat of vaporization of oxygen is 2.13 x 105 J/kg.) m = i kg/s