All Questions
Tagged with sublimation phase
9 questions
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How does water sublimate at normal atmospheric pressures/conditions (i.e., without a phase boundary between solid and gas)?
I remember my high school chemistry teacher stating that water could sublime under normal atmospheric conditions that would exist in e.g., Lancaster County, PA, where Amish would hang clothes to dry ...
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What is the difference between sublimation and instantaneous fusion+vaporisation?
Sublimation is defined by the IUPAC as The direct transition of a solid to a vapour without passing through a liquid phase.
A sublimation equilibrium can occur in two sets of conditions:
at a ...
- 460
2
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870
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Internal energy for Phase Transitions
Can we justify that "For sublimation of a solid at 1 atm $\Delta U>0$ at low temperature and $\Delta U<0$ at high temperature?"
I read several answers and came to know that $U=f(T)$ ...
- 168
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Why does CO2 only exist in gaseous and solid state under STP/SATP?
Why does carbon dioxide only exist in gas and solid state under STP/SATP conditions?
$\ce{CO2}$ pressurized to $\pu{5.1 atm}$ can exist in all 3 states: solid, gas, and liquid.
However, why couldn't ...
- 153
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Does naphthalene in moth balls really sublimate or does it evaporate?
The triple point of naphthalene is $\pu{-56 °C}, \pu{1.05 kPa}$ (which is much less than $\pu{1 atm}$). So how can a naphthalene ball sublimate at $\pu{1 atm}$, when considering that its melting point ...
- 79
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Vacuum at different altitude
I have tried to find this searching the internet and I am not sure if I understand it. I want to turn water from solid to gas without going into the liquid phase - Sublimation.
The altitude above sea ...
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Equilibrium saturation/depostion rate calculation
I found the Knudsen/Langmuir equation for calculating the sublimation rate of a solid. If I have a closed system, once the vapor reaches the saturation pressure, the solid will continue sublimating ...
- 1,690
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Sublimation of Iodine
Why does iodine sublime? I have researched it myself and I have got the same answer; it sublimes because it directly converts from solid to gas. But why don't bromine or chlorine also sublime?
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Which elements have no liquid form at atmospheric pressure?
Carbon has no liquid form at atmospheric pressure. Is this unique amongst naturally occurring elements?
The more interesting and vague question is, is this property somehow important or related to ...
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