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This happens in certain circumstances due to what is called the Joule Thomson Effect
For most fluids, flow through a valve results in a dropping of both pressure and temperature. Some fluids such as helium,hydrogen have a "reverse Joule-Thompson" effect, which simply means that instead of the temperature dropping along with the pressure, the temperature actually increases.
If the gas molecules were so close together that moving apart would give
them a lower potential energy, then the molecules repel each other.
Expansion lowers the intermolecular potential energy. This means that
expansion releases energy from the intermolecular potential, and that energy
is picked up by the molecules' kinetic energy. In other words, the gas
molecules speed up and the temperature increases.
What else can I help you with?
Why must a hot test tube should be left to cool before washing it?
A hot test tube should be left to cool before washing to prevent it from cracking due to sudden temperature changes, known as thermal shock. This can occur when hot glass is exposed to cool water, causing uneven expansion and contraction of the material. Letting the test tube cool gradually reduces the risk of damage.
How can hydrogen be changed into a liquid?
Compress it and cool it Compress it and cool it Nathan G
How do you make liquid hydrogen?
You cool the hydrogen below the temperature of -259.34 degrees Celsius.
Can you condensate hydrogen?
cool it to below its boling point
What two elements were abundant and vital as the expanding universe began to cool?
Hydrogen and helium - but especially hydrogen.
What does an exhaust system expansion box do?
An exhaust system expansion box allows for the cooling of extremely hot air. The hot exhaust is cool in the expansion box before exiting the tailpipe.
What will be the first Sims 3 expansion pack?
it will be world adventures it will be SUPER COOL!
Matter expands when its gets hotter and contracts when it cool?
The explanation of Thermal Expansion.
Why is hydrogen used in the space shuttle engine?
To fuel it and cool it
What does a star become when it expands and outer layers cool?
When a star expands and its outer layers cool, it becomes a red giant. This occurs in the later stages of a star's life cycle, particularly for stars with masses similar to the Sun. The expansion is caused by the star running out of hydrogen fuel in its core and beginning to fuse helium into heavier elements.
Why is preferable to allow the hot solution to cool gradually instead of chilling immediately in an ice bath?
Allowing the hot solution to cool gradually allows for more uniform crystal formation, resulting in larger and higher quality crystals. Rapid chilling can lead to shock cooling and smaller crystals due to the sudden temperature change.
A large cool star formed when a star runs out of hydrogen?
red giant
