(A) With as much detail as possible, describe the phase changes that would occur if a sample of water represented by point R in Figure 12-30 were brought first to point P and then to point Q.

Figure 12-30

(B) Draw a sketch showing the condition prevailing along the line PR when 1.00 mol of water has been brought to the point where exactly one-half of it has vaporized. Compare this to the condition at point R in Figure 12-31, assuming that this is also based on 1.00 mol of water. For example, is the volume of the system the same as that in Figure 12-31? If not, is it larger or smaller, and by how much? Assume that the temperature at point R is the same as the critical temperature of water and that water vapor behaves as an ideal gas.

Figure 12-31

Transcribed Image Text:

Pressure (not to scale) 1 atm Ice II Ice I Ice V Ice III D Q P Ice VII Ice VI Liquid water Gaseous water Temperature (not to scale) C --R