A lead storage battery used in an automobile is able to deliver 5.2 MJ of electrical energy. This energy is available for starting the car. Let compressed air be considered for doing an equivalent amount of work in starting the car. The compressed air is to be stored at 7MPa, 25°C. What is the volume of the tank that would be required to let the compressed air have an availability of 5.2 MJ ? For air, pv = 0.287 T, where T is in K, p in kPa, and v in m3/kg.