Carbon dioxide has a normal sublimation point of -78.5 °C, its triple point is at 5.11 atm and -56.6 °C, and the critical point is at 72.8 atm and 31.0 °C.
a. Use this data to roughly sketch its phase diagram. Be sure to label the solid, liquid, and gas regions as well as axes.
b. On your phase diagram above, mark the point for standard temperature and pressure (STP) with an X, then draw a dashed line from there that corresponds to compressing from STP into a liquid state while maintaining constant temperature.