Question

Question #406a2

Answer 1

This really is a terrible question, and I would appreciate it if you told us in which course, at what level, it was asked (1st year undergrad.?).

Explanation:

You have been give some thermodynamic data, in order to distract you (i.e. trick you!). Given that it asks about vaporization of a liquid, clearly, we can eliminate `B.`, and `C.`, and `D.`, and possibly `E.`

So the only candidates are `A.` and `E.` `E.` is conraindicated, because we know that `PCl_3` is a real liquid, and it makes sense that its vaporization, its boiling point can be measured, and they have given you the required thermodynamic parametes in the preamble.