A sketch of the phase diagram (not to scale) of water is given below. Which stat

Question

A sketch of the phase diagram (not to scale) of water is given below. Which statement conversing the path (broken line) is false? At point E the water is all solid (ice) If heat is added to the ice at point E the temperature of the increase line AB is reached, then the temperature remains constant unit of the ice is liquid. Once all the ice has melted (at the intersection of the broken line and line AB) the temperature of the water increase as heat is added unit point F is reached. If more heat is added upon reaching point F, the temperature will remain constant as the liquid water vaporizes. Another way to vaporize all of the liquid water at point F is to increase the

Explanation / Answer

option. E. FALSE

Ans.

Option A: Correct. E denotes solid phase of water.

Option. B. Correct. The broken line indicates phase transition from solid to liquid phase of water. Adding heat does not increase temperature until all ice melts into liquid water.

Option. C. Correct. Once all ice melts, the temperature of liquid water increases maximum to its boiling point (Point F, 1000C).

Option. D. Correct. At 1000C (boiling point), the temperature of liquid water remains constant at F until all liquid water is vaporized.

Option. E. Incorrect. Increase in pressure decreases rate of vaporization. Thus, the statement is incorrect.

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