An air bottle used for scuba diving breathing apparatus has avolume of 30 l. After it has been used, the pressure andtemperature of the remaining air in the bottle are 0.3 MPa and 24â—¦C. Before the apparatus is used again, it is charged with air attemperature of 50 â—¦C until the pressure in the bottle reaches 6MPa. The charging processes is fast, and can be assumed to beadiabatic.
Questions: (a) Calculate the massof air to be added to the bottle.
(b) What is the temperature ofthe air in the bottle at the end of the chargingprocess?
