Thermodynamics of matter under pressure

[EEstudentNAU]

Imagine a tank with dry ice under high pressure, 150 psi or higher. A pipe carrying a fluid (with a freezing point lower than the temperature of the tank) passes through the tank with an initial temperature much higher than the tank.

What will happen to the dry ice? I assume the temperature of the tank will rise because of the hotter fluid passing through. Will the pressure rise as well?

 

[alxm]

If you raise the temperature of a closed vessel the pressure will go up, no matter what's in it.

 

[EEstudentNAU]

What will happen to the dry ice?

 

[zzzoak]

Please look here: pressure-temperature phase diagram of CO2:
http://en.wikipedia.org/wiki/File:Carbon_dioxide_pressure-temperature_phase_diagram.svg"
If conditions are in blue region then dry ice will melt.
In red region will remain solid.