Question

A phase diagram of a pure compound has a triple point at 22.0 C and 32 mm Hg, a normal melting point at 22.8 C, and a normal boiling point at 107 C. Which of the following statements regarding this compound is/are CORRECT?
1/ The density of the liquid is greater than that of the solid.
2/ Sublimation occurs if starting with a solid at a constant temperature of 25 C the pressure is decreased until a phase change occurs.
3/ Condensation occurs if the temperature is decreased from 122 C to 75 C at a constant pressure of 1.00 atm.
A.1 only
B.2 only
C.3 only
D.1 and 2
E.1, 2, and 3

Answer

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