A pressure vessel that has a volume of 10m3 is used to store high-pressure air for operating a supersonic wind tunnel. The air pressure and temperature inside the vessel are 20 atm and 300K, respectively, calculate the change in the specific entropy of the air inside the vessel if enough heat is added to increase the temperature to 600K. What is the air pressure inside the vessel?.

A pressure vessel that has a volume of 10m3 is used to store high-pressure air for operating a supersonic wind tunnel. The air pressure and temperature inside the vessel are 20 atm and 300K, respectively, calculate the change in the specific entropy of the air inside the vessel if enough heat is added to increase the temperature to 600K. What is the air pressure inside the vessel?.