If there's an absolute cold, -460 degrees, is there an absolute hot?

Question

absolute cold is -460 degrees f. I've never heard of absolute hot.

Answer 1

Great question! And there is a absolute hot, at least for proponents of the Big Bang. If all matter originated in one big event, at some point during that 'explosion' the maximum universal kinetic energy was reached, and that is as hot as things could get. After this, the universe tends towards entropy, or a 'averaging out' of all available energy to a base level. Right now you could call that the 'temperature' of space.

The measurement of the kinetic energy of a molecule is relative, so 'absolute zero' is a observation made under local conditions. Conceivably, under local conditions, one could accelerate some mass to the speed of light. How to do it, or if it will ever be possible, don't ask me!

Answer 2

Since temperature is the measure of the average kinetic energy of the particles of a system,
0 Kelvin is the lowest possible temperature which an object may be theoretically cooled to.
0 Kelvin is known as "Absolute zero".
At absolute zero, the particles are said to have stopped and contain no KE.

There is no "absolute hot" as you call it, at it is not commonly referred to. However, there are temperature at which ordinary matter as you and I know it cannot exist.
Also, remembering the fact that the temperature of an object is proportional to the KE (and thus the velocity) of the particles, it is limited by the speed of light. The particles of a system (which have mass) can never achieve or exceed the speed of light in a vacuum, and thus, there theoretically must be some maximum temperature which one could measure in a reference frame at rest to the particles.

Answer 3

A good question!

As we understand "absolute cold" as the temperature when all the molecules have the velocity 0, the absolute hot should be when they all have maximum velocity. For all we know, C (the velocity of light) is the maximum possible for any physical body. We can thus assume there IS an absolute hot. But the exact point is still to be defined, I guess. Or at least calculated.

Answer 4

There is no upper limit on the heat scale. Temperature is a measurement of the average kinetic energy of a substance's particles. Absolute zero occurs when an object loses all of its kinetic energy and stops moving. Technically, cold does not exist to a scientist, but rather it would be reported as a small measurement of heat.
The only limits on the maximum temperature of a substance is the sample's mass, volume, or pressure. Changes in these attributes will result in a temperature change.

Answer 5

No. Absolute zero is the point at which all atomic activity ceases. If there was an absolute hot, it would have to be measured with respect to all of the matter in the universe. Thus, we would have to know precisely how much matter comprises the universe in order to determine how much energy it could produce.

Answer 6

Absolute 0 is when the inter atomic/ subatomic particular vibration/ motion becomes zero ie no relative motion between any atoms.

In the same parlance, absolute hot could be, when relative speed of vibration between particles reach light speed, C.

No one has calculated that temperature, but it seems like there is an upper limit to temperature.

Answer 7

Yes, around 150 degrees is absolutely hot.
There is no absolute hot. At high temperatures the temperature is measured by the radiation from a surface. What is the temperature of a supernova at the moment of explosion?

Answer 8

I've never heard of absolute hot but I am pretty sure it is the temp of the sun which is 5780 Kelvin which is 6053 degress C

Answer 9

Cold is absense of motion at the atomic level - heat is an abundence of motion at the atomic level - You can keep adding motion / heat, but you can only take what motion is there away (cold)

Answer 10

no. Absolute zero is the point where all motion stops and cannot be reached. There is no opposite to that.