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.
