3. A storage tank with a surface area of 35 m² and a wall thickness of 100 mm contains 2000 kg of hydrogen gas at a concentration of 110 kg/m³. The atmosphere outside the tank has a hydrogen concentration of 0.2 kg/m³. If D = 8×10-11 m²/s, how long will it take (in years) for 4% of the hydrogen to diffuse out of the tank? Assume steady-state conditions.

In the graph below, each unit on the horizontal axis is 1.90 103 m³ and each unit on the vertical axis is 0.200 atm. (a) Determine the change in internal energy of the gas if 2042 J of heat is added as it expands in volume along the direct path CA. 1306 J (b) To get the same change in internal energy, how much heat must be added to the gas as it goes along the path CBA? J just need help for part b B A

A frictionless piston-cylinder device contains 4.5 kg of nitrogen at 110 kPa and 200 K. Nitrogen is now compressed slowly according to the relation PV 1.5= constant until it reaches a final temperature of 360 K. Calculate the work input during the process, in kJ.

Refrigerant 134a expands in a piston-cylinder assembly from p₁ = 140 lb/in² and T₁ = 140°F to p₂ = 30 lb/in² and T₂ = 80°F. The mass of refrigerant is 0.44 lb. During the process, the work done by the refrigerant is 4.32 Btu. Kinetic and potential energy effects are negligible. Determine the initial volume of the refrigerant, V₁, in ft³, and the heat transfer for the process, in Btu.

A 0.8 lbm object traveling at 200 ft/sec enters a viscous liquid and is essentially brought to rest before it strikes the bottom. What is the increase in internal energy, taking the object and the liquid as the system? Neglect the potential energy change.

If 3.00 moles of gas are in a container with a volume of 60.0L at a temperature of 400 K , what is the pressure inside the container?