A thermodynamicist is attempting to model the process of balloon inflation by assuming that the elastic casing behaves like a spring opposing the expansion as presented in the figure. As air is admitted, the spring is compressed. The pressure in the gas space is given by P-Pi = k(L-Li) , k = const = 5 bar/m. The initial conditions in the gas space are Pi = 1 bar, Ti = 300 K, and Li = 0.15 m. The piston area is 0.02 m2. The air is an ideal gas and cv = 20.9 J/mol. K, independent of temperature. What is the air temperature in the gas space when L = 0.6 m? What is the entropy generation in the process and change in the availability of the system?