Chapter 12, Problem 12.93QP

The south pole of Mars is covered with solid carbon dioxide, 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 12.30 to determine the normal sublimation temperature of dry ice and Equation 12.4. which also applies to sublimations.]