If the sublimation point of a substance is the point where its equilibrium vapor pressure exceeds the pressure of the atmosphere upon it, and if every solid above absolute zero has some vapor pressure (albeit minimal), then it would seem that in a vacuum, where the pressure of the atmosphere is z...
Can someone help me understand this question? I don't understand "If the sublimation point of a substance is the point where its equilibrium vapor pressure exceeds the pressure of the atmosphere upon it" at all.
To my understanding, sublimation is sensitive to the partial pressure of the substance in question, not "atmospheric pressure". Perhaps I'm just misreading the question?
By "atmosphere" do they mean the partial atmosphere of the substance?
From the US National Chemistry Olympiad:
A sample of a pure substance is placed in a sealed, rigid
container and the pressure is measured as a function of
temperature. Which is the best explanation for the result
shown?
(A) At lower temperatures, the substance is a mixture of
solid and vapor,...
@uhoh Sublimation point is like boiling point. but for solid. Depends on equilibrium vapor pressure. Looks like you think of sublimation below this point which is akin to evaporation.
From the US National Chemistry Olympiad:
A sample of a pure substance is placed in a sealed, rigid
container and the pressure is measured as a function of
temperature. Which is the best explanation for the result
shown?
(A) At lower temperatures, the substance is a mixture of
solid and vapor,...
The Periodic Table
The Periodic Table