Question

8. You decided to go camping and wanted to find out how much liquid propane is left in a used cylinder. The weight of this cylinder when it is full and empty is 80 pounds and 20 pounds respectively. Currently it weighs 50 lb. If the densities of liquid and vapor propane at 70 degree F are: 30.19 lb/ft^3 and 1.15 lb/ft^3 respectively. Determine: (a) Volumetric percentage of the propane liquid phase left the cylinder (b) Mass fraction of liquid propane in the cylinder (c) What's the volume of the cylinder excluding propane... Imagine that with propane is a bulk volume and without propane (which is occupying the pore space) you are evaluating the volume of the material. Assume it's made of iron (density is 491 lb/ft^3)

Answer 1

Weight of empty cylinder -20 pounds weight of full cylinder-80 pounds Initi al weight of li quid propane 60 pounds current weight of cylinder- 50 1bs current weight of li quid propane 50-20 30 lbs li quid propane left-30 1bs density of liquid propane 30.19 lb/ft density of vapor propane 1.15 1b/ft Calculate the volume of liquid propane as follows 30 1bs 30.19 1b/ft 0.9937 f3 Volume left is 0.9937ft nitial volume of propane _ 60 1bs 30.19 lb/ft 1.987 ft Initial volume 1.987 ft Volumetric percen of cylinder is as follows 0.9937 1.987 50% x100 mass of liqui d propane in the cylinder is as follows 30 1bs 60 1bs 0.500 Volume of cylinder is as follows 20 1bs 4911bs/ft 0.0407 ft