Answer:
pressure is created at the wall's surface
Step-by-step explanation:
When air is filled in an empty tank, air molecules try to spread through out the tank. The gas molecules has random and continues motion due to which they possess kinetic energy. Due to this energy air molecules continuously strike with the wall of the tank and apply force on the wall of tank due to which reaction force is applied on air molecule In this way pressure is created on tanker's walls and it becomes hot.