[2022] in a room with a vacuum, the oxide releases oxygen

Ice will sublimate in a vaccum, as it gets heated due to solar radiation, if it is in direct sunlight.

https://www.sciencedirect.com/science/article/pii/S0019103521002785

More info on this process, which we try model in stationeers:
https://en.wikipedia.org/wiki/Sublimation_(phase_transition)

Originally posted by penza_58(RUS): after the release of oxygen in the room, the temperature is below zero, but still it is impossible to separate the oxide in the room, it continues to evaporate

Once the ice sublimates, it can often be very very cold.

Ice melt to temperature
Ice melting occurs due to temperature, but the gas must be above the armstrong limit (6.3kPa) for most thermodynamics to occur in the game (if below that, particles are considered too far apart). This isn't *quite* how it is, the armstrong limit is a real thing... but we moved a lot of numbers around it to make the simulation more predictable.

https://en.wikipedia.org/wiki/Armstrong_limit

Ice melt due to submlimation
Ice can also melt due to submilmation, if solar radiation comes in direct contact with the ice. Again, this is a very real process. Even water ice, when deeply frozen, goes through a metamorphosis when in direct contact with sunlight.

below 6.3kPa, atmospheres will function much more like a vacuum than a pressurized area for some thermodynamics equations.

Originally posted by argenex: instantly evaporates in my 100kpa, 21 degree Celsius pressurized cabin

Ice will always melt in a 100kPa environment if it is above freezing, and not in a container that prevents atmos access (like a mining belt)