A sample of liquid water at atmospheric pressure has a temperature just above the freezing point. Refer to Figure 17-37 to answer the following questions.

Figure 17-37,

(a) What phase changes occur if the temperature of the system is increased while the pressure is held constant?
(b) Suppose, instead, that the temperature of the system is held constant just above the freezing point while the pressure is decreased. What phase changes occur now?

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Solid Liquid 101 Gas т, т, T2 т. Temperature, T ("C) Pressure, P (kPa)