How would I perform a vertical phase transition going from point #a# to #b# at constant pressure, where #a# is a gaseous state and #b# is a liquid state? Please describe in detail so I can explain this.
1 Answer
It's impossible to accomplish this change at constant pressure; a vertical shift in the phase diagram requires a pressure change at constant temperature. So you should correct the question in your answer.
Here's what I have:
This change from a to b involves an increase in pressure, and can be accomplished by slowly pressing the piston down. First, a condensation should occur, without any change in temperature until all the gas is condensed. Then, one can predict that the temperature would increase due to the greater number of collisions in a smaller system volume, and thus, there ought to be a heat sink at the boiling point temperature to keep the temperature constant. Barely any change should be visible after the gas condensation has finished and further compression of the liquid is performed.
Be sure to try to reword this so you do not plagiarize.
