A portion of the phase diagram of uranium hexafluoride (UF₆) is shown below.
Which statements are correct?
I. UF₆ sublimes, rather than melts, at 1 atm pressure.
II. At 2 atm and 45 °C, only solid UF₆ is present at equilibrium.

Question

A portion of the phase diagram of uranium hexafluoride  (UF6) is shown below.

Which statements are correct?
I. UF6 sublimes, rather than melts, at 1 atm pressure.
II. At 2 atm and 45 °C, only solid  UF6 is present at equilibrium.

Accepted Answer

Correct answer: C.

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