Question

1. consider the phase diagram of an unknown substance. (ch. 11) what is the physical state of the substance at t=150 k and p=0.2 atm? a. solid b. liquid c. gas d. state of denial pressure (atm) 0 0.5 1.0 temperature (k) 0 100 200 300 400

Explanation:

Step1: Locate T=150K on y-axis

Find 150K vertically on the temperature axis.

Step2: Locate P=0.2atm on x-axis

Find 0.2atm horizontally on the pressure axis.

Step3: Identify intersection region

The point (0.2 atm, 150 K) lies in the "solid" region.

Answer:

A. solid