The result, scientists found, is that winter ice will float in Titan’s methane-and-ethane-rich lakes and seas if the temperature is below the freezing point of methane — minus 297 degrees Fahrenheit (90.4 kelvins).
How cold does it have to be to freeze methane?
Methane freezes at precisely -297 degrees Fahrenheit.
At what temperature does methane freeze on Titan?
On Titan, the clouds and rain are formed of liquid methane. On Earth, methane is a flammable gas, but Titan has no oxygen in its atmosphere that could support combustion. Also, the temperatures on Titan are so cold — minus 300 degrees Fahrenheit (minus 149 degrees Celsius) — that the methane can form liquid.
Does methane freeze from the top down?
Also, when ethane ice forms, it freezes on the bottom of the liquid, while methane ice freezes at the top of the liquid, implying ethane ice is denser than the solution, while methane ice is less dense; this holds for all concentrations.
Can liquid methane freeze?
Previous studies have shown that the freezing point of methane is depressed when mixed with nitrogen . … Our recent work has shown that although methane and ethane have similar freezing points (~91 K), when mixed they can remain liquid down to 72 K.