A rigid tank of volume 0.5 m' is initially evacuated. A tiny hole develops in the wall, and air from the surroundings at 1 bar, 21C leaks in. Eventually, pressure in the tank reaches 1 bar. The process occurs slowly enough that heat transfer between the tank and the surroundings keeps the temperature of the air the tank constant at 21C. Determine the amount of transfer, in kJ. A rigid tank of volume 0.5 m' is initially evacuated. A tiny hole develops in the wall, and air from the surroundings at 1 bar, 21C leaks in. Eventually, pressure in the tank reaches 1 bar. The process occurs slowly enough that heat transfer between the tank and the surroundings keeps the temperature of the air the tank constant at 21C. Determine the amount of transfer, in kJ.