Question

use the phase - diagram of substance x below to find the temperature at which x turns to a gas, if the pressure above the solid is 0.20 atm. note: your answer must be within 12.5 °c of the exact answer to be graded correct.

Explanation:

Step1: Locate pressure on phase - diagram

Locate 0.20 atm on the pressure axis.

Step2: Find corresponding temperature

Find the temperature at which the substance changes to gas at this pressure by reading the intersection of the pressure - line with the gas - phase boundary on the phase - diagram.

Answer:

(The specific temperature value needs to be read from the actual phase - diagram which is not provided with clear scale values in the description. But the process is as above to find the temperature at the intersection of the 0.20 atm pressure line and the gas - phase boundary on the phase - diagram.)