Phase diagram

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Temperature101

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Ignore the gas and solid phase labels etc...consider this diagram as pure liquid. The line tha usually repersent solid-to-liquid phase is Line 1. The other one is Line 2. Sorry...Could not find a pure liquid diagram online.

The figure above depicts the phase diagram of a pure liquid. How will the phase boundary lines shift as a solute is dissolved in this liquid?
A. Line 1 will shift to lower P, and Line 2 will shift to lower T.
B. Line 1 will shift to higher P, and Line 2 will shift to lower T.
C. Line 1 will shift to lower P, and Line 2 will shift to higher T.
D.Line 1 will shift to higher P, and Line 2 will shift to higher T.

Answer: C
I dont get that one. I picked something else for the answer but I was wrong.
 
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oops...


Ignore the gas and solid phase labels etc...consider this diagram as pure liquid. The line tha usually repersent solid-to-liquid phase is Line 1. The other one is Line 2. Sorry...Could not find a pure liquid diagram online.

The figure above depicts the phase diagram of a pure liquid. How will the phase boundary lines shift as a solute is dissolved in this liquid?
A. Line 1 will shift to lower P, and Line 2 will shift to lower T.
B. Line 1 will shift to higher P, and Line 2 will shift to lower T.
C. Line 1 will shift to lower P, and Line 2 will shift to higher T.
D.Line 1 will shift to higher P, and Line 2 will shift to higher T.

Answer: C
I dont get that one. I picked something else for the answer but I was wrong.
 
Last edited:
When you add solute you increase the size of the liquid phase so solid to liquid will shift to a lower pressure and gas to liquid will shift to a higher temp meaning more liquid at lower T and more liquid from solid at lower pressures.
 
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