Solid water (ice) is slowly warmed from a very low temperature. Part A What minimum external...
Solid water (ice) is slowly warmed from a very low temperature.
Part A
What minimum external pressure p1 must be applied to the solid if a melting phase transition is to be observed?
p1 = ? Pa
Part B
Above a certain maximum pressure p2, no boiling transition is observed. What is this pressure?
p2 = ? Pa
Homework Answers
Refer to the triple point diagram of water. It that point on the where the all three phases (solid, liquid and gas) co-exist.
Part a) If the pressure is below 611.73 Pa then only solid phase exist. Thus minimum 611.73 Pa should be applied
p1 = 611.73 Pa
Part b) There is pressure point in the water phase diagram above which only liquid phase of water (supercritical fluid) exists and no boiling is observed. That point of pressure corresponds to critical pressure and is equal to 22.06*106 Pa. Thus
p2 = 2.206*107 Pa
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