Question

The pressure in a cylinder of nitrogen continuously decreases as a gas is released from it. On the other hand, a cylinder of propane maintain the constant pressure as propane is released. Explain this difference in behavior

Answer 1

Step-by-step explanation:

Nitrogen gas in nitrogen cylinder is in gaseous form only . So when gas is released , pressure decreases because moles of gas in the cylinder decreases .

Propane gas in cylinder is in liquified form . The gas is partially in gaseous and liquid form . So when gas is released outside , pressure decreases inside but due to low pressure , some liquid form is converted into gaseous form which restores the pressure of gas inside cylinder . Hence , the pressure of gas remains unchanged inside cylinder.