Chapter 11, Problem 11.110QP

The south pole of Mars is covered with dry ice, which partly sublimes during the summer. The CO₂ vapor recondenses in the winter when the temperature drops to 150 K. Given that the heat of sublimation of CO₂ is 25.9 kJ/mol, calculate the atmospheric pressure on the surface of Mars. [Hint: Use Figure 11.41 to determine the normal sublimation temperature of dry ice and Equation (11.5), which also applies to sublimations.]