Vapor and atmosphere relationship based on altitude and under the water

[vDDmaniaC]

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Hi, guys.

Can any one explain to me how the altitude affects the vapor pressure and atmosphere simulatneously? BP and MP are the equilibrium point between vapor pressure and atmosphere. For instance, water has high BP which means low vapor pressure. That means atmosphere are exerting more than vapor pressure than that in the horizontal line? So if you climb in the mountain the atmosphere pressure is getting stronger then vapor pressure is getting even lower so the boiling point eventually increases too? Conversely, if you ride on a sub-marine and try to boil water, then the water will boil in the low temperature than that of the mountain? Please correct me if I am wrong. Thanks!

 

[futuredent22]

At higher altitudes, atmospheric pressure is actually lower, so water will boil easier and boiling point will be less than 100.

On a submarine, I'd imagine that atmospheric pressure would be increased, so the boiling point of water would be higher than 100.

 

[DDSguyLA]

boiling pressure is reached when the pressure of the liquid equals the pressure of the atm.
the higher in altitude the lower the pressure of the atm, the lower the pressure the atm the lower amount of heat need to raise the temp of the water to the pressure of the outside...
vice versa for lower alt

 

[vDDmaniaC]

Thanks!