A tank with a volume of 0.3 m^3 contains air at 6 bars and 300 K. The surrounding atmosphere is at 0.95 bar and 300 K. Determine a. the availability of the air, in KJ b. the change in the availability of the air if it now undergoes a free expansion until its volume is doubled, in KJ c. the irreversibility of the process in part (b), in KJ d. The second-law effectiveness of the process e. Now, if the original air undergoes a free expansion until the volume is tripled, determine the final availability of the air, in KJ, and the second-law effectiveness.