Question

(c) Consider a cup of water (H2O) at 1 atm presssure. As expected, at room temperature (25 C), the cup will have liquid phase. If the cup is put in a freezer at -10 C, you would expect the cup to contain solid ice (1h) phase, which is what you will get. This is because, as the temperature cools in the liquid, the molecules arrange themselves in relatively predictable places within ice lattice., which takes some time (rate of phase transformation).

Now consider that you developed a method of instantly freezing the liquid – there are practical ways of doing this. In this case, the liquid doesn’t get time to fully arrange in the ice-lattice! Upon examination it is revealed that this solid (X) has maintained a structure with the liquid randomness!

Is this solid X a liquid, or a crystal, or something else?   Explain. ___________________(2 points)

Is this solid X a new phase? Explain your answer. ___________________(2 points)

Since you have formed this solid X in the ice stable region, did you just break the Phase Rule (i.e. now ice and this solid X are both sustained where only Ice should)? Refer to the water phase diagram if you need to. Explain___________________ ___________________(2 points)

Answer 1

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