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Which one or more of the following techniques can be used to freeze water?
A. Cooling the water below its normal freezing point of 0 oC at the normal atmospheric pressure of 1.01 × 105 Pa.
B. Cooling the water below its freezing point of -1 oC at a pressure greater than 1.01 × 105 Pa.
C. Rapidly pumping away the water vapor above the liquid in an insulated container (The insulation prevents heat fl owing from the surroundings into the remaining liquid.)
(a) Only A
(b) Only B
(c) Only A and B
(d) A, B, and C
(e) Only C |
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