# What happens if something is colder than absolute zero?

## What happens if something is colder than absolute zero?

A temperature below absolute zero: Atoms at negative absolute temperature are the hottest systems in the world. At zero kelvin (minus 273 degrees Celsius) the particles stop moving and all disorder disappears. Thus, nothing can be colder than absolute zero on the Kelvin scale.

## Can it get colder than absolute zero?

Absolute zero is often thought to be the coldest temperature possible. At the physically impossible-to-reach temperature of zero kelvin, or minus 459.67 degrees Fahrenheit (minus 273.15 degrees Celsius), atoms would stop moving. As such, nothing can be colder than absolute zero on the Kelvin scale.

Is absolute 0 possible?

Physicists acknowledge they can never reach the coldest conceivable temperature, known as absolute zero and long ago calculated to be minus 459.67°F.

### What happens to gas at absolute zero?

For most gases there is a linear relationship between temperature and pressure (see gas laws), i.e., gases contract indefinitely as the temperature is decreased. Theoretically, at absolute zero the volume of an ideal gas would be zero and all molecular motion would cease.

### How cold is deep space?

Hot things move quickly, cold things very slowly. If atoms come to a complete stop, they are at absolute zero. Space is just above that, at an average temperature of 2.7 Kelvin (about minus 455 degrees Fahrenheit).

What happens to gases when cooled?

If a gas is cooled, its particles will eventually stop moving about so fast and form a liquid. This is called condensation and occurs at the same temperature as boiling.

## How is space cold?

In space, there is no air or water, so the only way to lose heat is by radiation, where your warm and wiggly atoms release energy directly into space.

## Why is the air colder at higher altitudes?

Since the temperature of the Earth is so much hotter than space, you’d expect that the closer you get to space the colder it gets. Eventually as you get closer to the sun, the temperature will start to increase. You may have heard people say that the air is “thinner” at higher altitudes.

What happens when snow falls in the air above freezing?

As snow falls into the layer of air where the temperature is above freezing, the snow flakes partially melt. As the precipitation reenters the air that is below freezing, the precipitation will re-freeze into ice pellets that bounce off the ground, commonly called sleet.

### Which is colder, zero or zero degrees Celsius?

Absolute zero is -273.15 C and nothing can be colder than that. It’s not that we can’t get there, it’s that it doesn’t exist. It’s like asking for a string of negative length. The closest you can easily get is liquid nitrogen at roughly -200 C, and it can’t do squat to a human skin in a single second.

### Why is space colder than the sun or earth?

Answer 2: So you know that the sun is really hot, but space is really cold. Since the temperature of the Earth is so much hotter than space, you’d expect that the closer you get to space the colder it gets. Eventually as you get closer to the sun, the temperature will start to increase.

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