Temperature of the Heat Death of the Universe?

In summary: Heat_death_of_the_universeYes but what I'm also wondering or thinking is that all matter should be in the same form at the heat death of the universe (photons), do you know anything about this?In summary, the temperature of the heat death of the universe, if it ever occurs, will be zero in an expanding universe. This is because energy is constant and its density becomes thinner as the universe expands. At this point, particles will be in thermal equilibrium, but particles with different masses will have different velocities. However, at 0 K, all massive particles will freeze into cosmic microwave background, though it will not be microwave but infinite-length waves. All matter should be in the form of photons at the heat death of
  • #1
Alutoe
5
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Is there a way to calculate the temperature of the heat death of the universe based on the total amount of energy currently in the universe. And if the total amount of energy in the universe is zero (compose dof equal and opposite parts) is it possible for the parts to cancel each other out and return to a state of non-existence? Furthermore, I have heard that when the heat death of the universe happens everything will be at the exact same temperature, that is the velocity of all particles will be the same. But do we have a clue as to what type of particles will be around? Also, if everything is at the exact same temperature would that mean the universe could all be in a super fluid state?
 
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  • #2
Alutoe said:
Is there a way to calculate the temperature of the heat death of the universe based on the total amount of energy currently in the universe.

In an expanding universe, which we think we live in, the temperature of heat death, if it ever occurs, will be zero.

Furthermore, I have heard that when the heat death of the universe happens everything will be at the exact same temperature, that is the velocity of all particles will be the same.

Energies, not velocities.
 
  • #3
voko said:
In an expanding universe, which we think we live in, the temperature of heat death, if it ever occurs, will be zero.

Thank you, can you tell me where you know this from or a good direction to search into get the finer details of the idea?



voko said:
Energies, not velocities.

What I was saying was that the energy, and temperature (meaning the velocity) of all particles will be the same at the point when entropy is at a maximum. But that's even wishy-washey since they shouldn't have any velocity or energy available to do work. An interesting question now is will there still be energy present in the form of mass? My instinct says there would not be.
 
  • #4
Alutoe said:
Thank you, can you tell me where you know this from or a good direction to search into get the finer details of the idea?

Energy is constant, so its density is ever thinner as the expansion continues.

What I was saying was that the energy, and temperature (meaning the velocity) of all particles will be the same at the point when entropy is at a maximum.

Massless particles, such as photons, always move at the speed of light, no matter what their energy. Energy of massive particles depends on their mass and their velocity, so particles with different masses in thermal equilibrium must have different velocities. Except, of course, the equilibrium at 0 K, where all massive particles must freeze into cosmic microwave background - which will become a misnomer, because it will not be microwave, but infinite-length-wave.
 
  • #5
voko said:
Massless particles, such as photons, always move at the speed of light, no matter what their energy. Energy of massive particles depends on their mass and their velocity, so particles with different masses in thermal equilibrium must have different velocities. Except, of course, the equilibrium at 0 K, where all massive particles must freeze into cosmic microwave background - which will become a misnomer, because it will not be microwave, but infinite-length-wave.

Yes but what I'm also wondering or thinking is that all matter should be in the same form at the heat death of the universe (photons), do you know anything about this?
 

What is the "Temperature of the Heat Death of the Universe?"

The "Temperature of the Heat Death of the Universe" refers to the theoretical concept that the universe will eventually reach a state of maximum entropy, where all energy is evenly distributed and no further work can be done. This is also known as the "heat death" of the universe.

What is the current estimated temperature of the Heat Death of the Universe?

The current estimated temperature of the Heat Death of the Universe is 2.73 Kelvin (-270.42 degrees Celsius or -454.76 degrees Fahrenheit). This is known as the "CMB temperature" and is the current temperature of the cosmic microwave background radiation, which is the remnant heat from the Big Bang.

How is the temperature of the Heat Death of the Universe calculated?

The temperature of the Heat Death of the Universe is calculated using the second law of thermodynamics, which states that entropy (disorder) in a closed system can never decrease. As the universe expands and energy is dispersed, the overall entropy will increase until it reaches a maximum, resulting in the "heat death" state.

Will the temperature of the Heat Death of the Universe continue to decrease?

No, the temperature of the Heat Death of the Universe is not expected to decrease any further. As the universe expands, the energy will become more evenly distributed and the temperature will reach a state of equilibrium. It is not possible for the temperature to decrease beyond this point.

What implications does the Heat Death of the Universe have for the future of our universe?

The Heat Death of the Universe has significant implications for the future of our universe. It suggests that eventually all stars will die, all matter will decay, and the universe will reach a state of maximum disorder. This would mark the end of all life and any possibility of future events or changes within the universe.

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