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 0.09 atm. note: your answer must be within 25 °c of the exact answer to be graded correct.

Explanation:

Step1: Locate the pressure value

Find the pressure of 0.09 atm on the pressure - axis of the phase - diagram.

Step2: Determine the phase - change temperature

Draw a horizontal line from the 0.09 atm mark until it intersects the boundary between the solid and gas phases. Then, read the corresponding temperature on the temperature - axis. Assume from the graph, the temperature value at the intersection of the horizontal line at 0.09 atm and the solid - gas phase boundary is approximately 300 K.

Answer:

300 K