Experiment:
Real Gases and Critical Point

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Description
Delivery scope

Objective: Quantitative analysis of a real gas and determining its critical point

Thematic focus:_..

	Qualitative Observations:_..
	•	Liquid and gaseous states
	•	Dynamic compression and expansion
	•	Formation of the transition point at various temperatures
	Quantitative Measurements:_..
	•	Display of the critical point and temperature
	•	Recording of isotherms in p-V (Clapeyron) diagrams
	•	Recording of isotherms in pV-p (Amegat) diagrams
	•	Pressure curves for a saturated vapor
	•	Differences between real gases and ideal gases

Experiment description:_..

Sulphur hexafluoride (SF₆) serves as a real gas and is examined in a measurement cell with only a minimal dead volume. Sulphur hexafluoride is especially suitable for this experiment, as its critical temperature (T_C = 319 K) and its critical pressure (p_C = 37.6 bar) are both relatively low. It is also non-toxic and is quite safe for use in teaching and in practical classes.

Additionally required:_..

•	Sulphur hexafluoride (SF₆)