The phenomena in Figure 12-22 will be seen at the critical temperature only if the proper amount

Question:

The phenomena in Figure 12-22 will be seen at the critical temperature only if the proper amount of liquid is placed in the sealed tube initially. Why should this be the case? What would you expect to see if too little liquid was present initially? If too much liquid was present?

Figure 12-22

Riley Workman Several degrees Celsius below T A few degrees Celsius below Te Critical temp. T