Answer
Yes.
Work Step by Step
Yes. Because the number of independent variables for a two-phase ($PH=2$), two-component ($C=2$) mixture is, from the phase rule,
$ IV = C − PH + 2 = 2 − 2 + 2 = 2 $
Therefore, two properties can be changed independently for this mixture. In other words, we can hold the temperature constant and vary the pressure and still be in the two-phase region. Notice that if we had a single component ($C=1$) two phase system, we would have $IV=1$, which means that fixing one independent property automatically fixes all the other
properties.
