🤓 Based on our data, we think this question is relevant for Professor Callam's class at OSU.

Solution: A gas or vapor may be liquefied only at temperatures(A) equal to the normal boiling point.(B) above the normal boiling point.(C) above the critical temperature.(D) at or below the critical temperature.

Problem

A gas or vapor may be liquefied only at temperatures

(A) equal to the normal boiling point.

(B) above the normal boiling point.

(C) above the critical temperature.

(D) at or below the critical temperature.