A rigid copper tank, initially containing 0.8m^(3) of air at 295K,5 bar, is connected by a valve to a large supply line carrying air at 295 K , 15 bar. The valve is opened only as long as required to fill the tank with air to a pressure of 15 bar. Finally, the air in the tank is at 310 K . The copper tank, which has a mass of 15 , kg , is at the same temperature as the air in the tank, initially and finally. The specific heat of the copper is c =0.385k(J)/(k)g*K. Assuming ideal gas behavior for the air, determine
(a) the initial and final mass of air within the tank, each in kg, and
m1= ◻ kg
m2= ◻ kg
(b) the heat transfer to the surroundings from the tank and its contents, in kJ , ignori kinetic and potential energy effects
Qcv= ◻ kJ