What is the expected pressure in a nitrous oxide E-cylinder after 60 minutes of use at a 3:2 mixture with oxygen?

To determine the expected pressure in a nitrous oxide E-cylinder after 60 minutes of use at a 3:2 mixture with oxygen, it's essential to understand how nitrous oxide behaves in its cylinder and how its consumption depletes the gas.

Nitrous oxide is stored at high pressure in a liquid state. When it is used in a mixture with oxygen, both gases are released, but nitrous oxide primarily turns from liquid to gas during this process. The pressure in the cylinder will depend on the remaining liquid nitrous oxide, which maintains a relatively constant pressure until most of the liquid is vaporized.

In a typical scenario with a nitrous oxide E-cylinder, the full cylinder is usually pressurized around 750 psig at room temperature. When using a 3:2 mixture with oxygen, nitrous oxide and oxygen will be consumed based on their volumes and pressures. However, nitrous oxide generally maintains its pressure until it gets significantly depleted.

After approximately 60 minutes of use, the expected pressure would still be fairly high if the user manages the flow rates and uses the gases efficiently. The pressure of 745-750 psig aligns well with the expected values remaining in the E-cylinder, given that the cylinder would still have a substantial