Question

use the phase diagram of substance x below to find the pressure at which the boiling point of x is - 41. °c. note: your answer must be within 1.5 atm of the exact answer to be graded correct. atm

Explanation:

Step1: Convert Celsius to Kelvin

First, convert - 41°C to Kelvin. The conversion formula is $K = ^{\circ}C+273.15$. So, $T=-41 + 273.15=232.15\ K$.

Step2: Read pressure from phase - diagram

Locate the temperature value of 232.15 K on the x - axis of the phase - diagram. Then, find the point on the liquid - gas phase boundary at this temperature. Read the corresponding pressure value on the y - axis. By visual inspection of the phase - diagram, the pressure at the boiling point (liquid - gas equilibrium) at $T = 232.15\ K$ is approximately 6 atm.

Answer:

6 atm