Fraction of liquefaction in propane gas throttling process

What happens to the propane gas in the throttling process?

Options:

a) It is completely liquefied

b) It remains in gaseous state

c) It turns into solid

The propane gas remains in gaseous state

When propane gas undergoes throttling from 200 bar and 370 K to 1 bar, no liquefaction of the gas occurs. This means that the propane gas remains in its gaseous state throughout the process.

Throttling is a process in which the pressure of a fluid is reduced quickly, causing a decrease in temperature without any phase change. In this case, the enthalpy of the propane gas remains the same before and after the throttling process, indicating that no liquefaction has taken place.

Therefore, the correct answer is that the propane gas remains in gaseous state during the throttling process.