Chemistry - Liquid Solution Question with Solution | TestHub
On the given phase diagram, a system of in equilibrium with at is isobarically cooled till ice appears in system. At this point the external pressure is decreased isothermally till the pressure is 4.6 mm Hg , Now the system is subjected to isobaric heating till the temperature is 273.16 K . Pick out the correct statements :
Options:(select one or more)
Answer:
Solution:
At point W, liquid water and vapor are in equilibrium at 360 torr. On isobaric cooling, the path reaches the solid–liquid boundary where ice first appears.
For water, the solid–liquid curve has a negative slope, so freezing occurs at a temperature slightly below 273.16 K but above 273.15 K. Hence, option D is false.
Then, pressure is decreased isothermally from 360 torr to 4.6 mmHg. At this temperature, only the solid phase is stable, so the system contains only H₂O(s) A is correct.
Finally, on heating at a constant pressure of 4.6 mmHg up to 273.16 K, the system reaches the triple point where ice, liquid water, and vapor coexist. Hence, C is correct and B is false.
Correct options: A and C