Carbon Dioxide Is Being Used as an Environmentally Safe Liquid

Multiple Choice

Carbon dioxide is being used as an environmentally safe liquid solvent for reactions. If the reaction is run at a temperature of 15^oC, what must the minimum pressure of the reaction vessel be? The phase diagram for carbon dioxide is shown below.

A) about 1 atm
B) about 10 atm
C) about 100 atm
D) about 500 atm
E) about 5 atm