1. The volume of a 7x 13-ft tank contains air at 225 psig and 90°F. How many 1 cu-ft drums can be filled to 60 psig and 85 °F if it is assumed that the air temperature in the tank remains at 90 °F? The drums have been sitting around in the atmosphere which is at 14.7 psia and 85 °F. R of air = 287.08 J/ kg K = 53.34 = ft Ibf /lbm °R = 1,716.49 ft Ibf /slug °R

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