Liquid propane enters an initially empty cylindrical storage tank at a mass flow rate of 10 kg/s. Flow continues until the tank is filled with propane at $20^{\circ}$C, 9 bar. The tank is 25 m long and has a 4-m diameter. Determine the time, in minutes, to fill the tank.

A1-m3 tank is filled with a gas at room temperature (20$^{\circ} \mathrm{C}$) and pressure (200 kPa). How much mass is there if the gas is (a) air, (b) neon, or (c) propane?

A 1.5-m-diameter, 4-m-long cylindrical propane tank is initially filled with liquid propane, whose density is $581 \mathrm{kg} / \mathrm{m}^{3}.$ The tank is exposed to the ambient air at $25^{\circ} \mathrm{C}$ in calm weather. The outer surface of the tank is polished so that the radiation heat transfer is negligible. Now a crack develops at the top of the tank, and the pressure inside drops to 1 atm while the temperature drops to $-42^{\circ} \mathrm{C},$ which is the boiling temperature of propane at 1 atm. The heat of vaporization of propane at 1 atm is 425 kJ/kg. The propane is slowly vaporized as a result of the heat transfer from the ambient air into the tank, and the propane vapor escapes the tank at $-42^{\circ} \mathrm{C}$ through the crack. Assuming the propane tank to be at about the same temperature as the propane inside at all times, determine how long it will take for the tank to empty if it is not insulated.

A 2.00-L flask is filled with propane gas $(C_3 H_8)$ at a pressure of 1.00 atm and a temperature of $-15.0^{\circ} \mathrm{C}$. What is the mass of the propane in the flask?

Propane $(C_3 H_8)$ is a gas commonly used as a home fuel for cooking and heating. Think about the size of this volume and the amount of propane that it contains. Why do you think propane is usually liquefied before it is transported?

A 1.5-m-diameter, 4-m-long cylindrical propane tank is initially filled with liquid propane, whose density is $581 kg/m^3.$ The tank is exposed to the ambient air at $25^\circ C$ in calm weather. The outer surface of the tank is polished so that the radiation heat transfer is negligible. Now a crack develops at the top of the tank, and the pressure inside drops to 1 atm while the temperature drops to $−42^\circ C,$ which is the boiling temperature of propane at 1 atm. The heat of vaporization of propane at 1 atm is 425 kJ/kg. The propane is slowly vaporized as a result of the heat transfer from the ambient air into the tank, and the propane vapor escapes the tank at $−42^\circ C$ through the crack. Assuming the propane tank to be at about the same temperature as the propane inside, at all times, determine how long it will take for the tank to empty if it is not insulated.