Chemistry: Concepts and Applications

 
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Teachers Notes:

An interesting web site that allows students to correlate high altitude cooking with that on Mars: http://www.thursdaysclassroom.com/13jul00/teachcook.html

Problem 1:
6.68 mbar x (1 atm/1013 mbar) = 0.00659atm

Problem 2:
Solid. The conditions on the surface of Mars are below the triple point of water. At these conditions water is in the solid phase.

Problem 3:
Sublimation. The atmosphere pressure is below the triple point and solid sublimes into vapor below this point.

Problem 4:
To have liquid water there must be an increase in atmospheric pressure and an increase in temperature. The ice could be heated if there was an increase in pressure.

Problem 5:
At a pressure of 0.01 atm, water would boil at 10°C on Mars.

Problem 6:
The pressure would be greater beneath the surface due to the force of the additional land mass. Therefore, at a greater pressure liquid water could exist.