Investigating other Planets Let us now consider the atmosphe

Investigating other Planets Let us now consider the atmosphere in Mars: Average Surface Minimum and Ai density at ground Atmospheric Atmospheric Temperature level ssure at ground composition (main components) 95.3% CO2 2.7% N2 0 03% H2O Temperatures 0.0059 atm 5 °C (day) 85 °C (night) -143 °C (lowest) 0.02 kg/m 27 °C (highest) In which of the following phases can CO2 be naturally found in this planet? 104 103 102 2 10 1.0 10-1 102 10 O Only gas O As solid, liquid, and gas O As liquid and gas O As solid and gas CARBON DIOXIDE NOTE: Notice the logarithmic scale in the y-axis of the graph. 120 -80 40 0 40 80 Temperature (\'c) O Previous Check Answer Next x

Solution

After looking at the phase diagram:-

CO2 exists as solid as well as gas in the atmosphere of mars.

This is because during the day time temperature rises & CO2 exists as gas.

Whereas during nights the temperature falls and CO2 exists as solid.

Mars does not have enough atmospheric pressure to convert CO2 into liquid phase.

So CO2 exists as solid as well as gas on mars.