A rigid vessel contain 5kg of wet steam at 0.4Mpa. After the addition of 9585KJ the steam has a pressure of 2.0Mpa and a temperature of 700°C. Determine the initial specific volume and specific internal energy

The air in an automobile tire with a volume of 2.60 ft3 is at 70°F and 22 psig. Determine the amount of air that must be added to raise the pressure to the recommended value of 30 psig. Assume the atmospheric pressure to be 14.6 psia and the temperature and the volume to remain constant. The gas constant of air is Ru 53.34 = 0.3704 The amount of air that must be added to raise the pressure is ft·lbf lbm-R 1 psia 144 lbf/ft² lbm. psia-ft³ lbm-R

A rigid tank contains 17 lbm of air at 20 psia and 75°F. More air is added to the tank until the pressure and temperature rise to 30 psia and 85°F, respectively. Determine the amount of air added to the tank.

A rigid tank contains 10 kg of water at 90°C. If 8 kg of the water is in the liquid form and the rest is in the Vapour form, determine (a) the pressure in the tank and (b) the volume of the tank.