Question

If above structure is the phase diagram of a substance Z. What is the closest normal boiling point of substance Z ?

• A. 100 K
• B. 200 K
• C. 300 K
• D. 400 K
• E. 500 K

Answer 1

Answer: (C)

300 K

The boiling point is obtained by drawing a horizontal line from pressure 1.0 atm and extending it to a point for liquid gas equilibrium. Thus, the closest normal boiling point of substance Z is 300 K.
Hence, option $C$ is correct.