Answer
Nitrogen is a permanent gas. The nitrogen gas can be liquefied by pressurizing it. Thus the nitrogen will be in gaseous state at lower pressure. Thus the pressure is to constantly to decrease to a cylinder containing nitrogen. But the propane is not a permanent gas. Thus at high pressure propane remains a liquid and thus the pressure is maintained in a propane cylinder
Work Step by Step
Nitrogen is a permanent gas. The nitrogen gas can be liquefied by pressurizing it. Thus the nitrogen will be in gaseous state at lower pressure. Thus the pressure is to constantly to decrease to a cylinder containing nitrogen. But the propane is not a permanent gas. Thus at high pressure propane remains a liquid and thus the pressure is maintained in a propane cylinder
