Consider air in an truck tire maintained at a pressure of 220 kPa (gage). The atmospheric pressure is 94 kPa. The air in the tire is at a temperature of 25 oC. A 4 mm diameter hole develops in the tire wall, due to a puncture. Approximating the flow out of the hole as isentropic, determine the initial mass flow rate of air leaving the tire [kg/sec].

Steam at a pressure of 100 kpa and a quality of 50% initially fills a rigid vessel having a volume of 0.5 m^3. the steam is then heated, causing the pressure in the vessel to rise to 150 kpa. determine: i. the mass of the steam in the vessel. ii. the temperature and quality of the steam after the heating process. ii the mass of the vapour, mg and liquid, m in the vessel after the heating process. if the steam in the vessel is now further heated, what would the pressure and temperature in the vessel be when all steam has turned into saturated vapour? b. sketch the processes in part (a) and part (b) on p-v and t-v diagrams, indicating clearly the temperatures, pressures and the paths. c. (0.59kg, 111.4°c, 73%, 0.4307kg, 0.1 593kg, 2.11 bar, 121.84°c)