What factors affect sublimation?

Answer 1

If there is high pressure, the sample is physically prevented from easily making the phase change at a constant temperature.

PV= nRT

solid --> liquid --> gas

S-->L at high pressure decreases the mp

L -->G at high pressure increases the bp and the temp at vaporization

Analogous to glaciers melting, ice under high pressure will melt.

Analogous to boiling an egg in Boston (sea level) or in Denver (1 mile above sea level). Which takes longer?

Boston, b/c the the pressure at sea level is greater, so the bp is higher. In Denver, there is less vapor pressure (ie, the air above the pot with the egg), so the temp of boiling is lower.

Answer 2

Increasing pressure will give a lower freezing point. So if you wish to keep ice cold longer, increase pressure on the ice.

Answer 3

I know that the point at which water boils decreases at a lower pressure. So I think the same is true of the other sublimation points.

Answer 4

There are 2 factors that affect sublimation. Temperature and Pressure. In order to make something sublime, you need to have low pressures and high temperatures.

Answer 5

the higher the pressure the more the evaporation rate occurs.

Answer 6

The rate of sublimation increases as the vapor pressure decreases.

Answer 7

Sublimation is accelerated at high temperature.

Answer 8

pressure and ofcourse temperature

Answer 9

pressure and high temperature