# Thought of the day_14_Heat Vs Temp

What is the difference between heat and temperature?

Note by Rohit Gupta
6 years ago

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Heat is a form of energy, while temperature is not. Temperature is a physical quantity which determines the degree of hotness or coldness of a body.

- 6 years ago

What do you mean by degree of hotness or coldness??

- 6 years ago

Measure of or more precisely, extent of.

- 6 years ago

dont you think that hotness and coldness is a matter of sensation and will actually depend upon the temperature difference..

- 6 years ago

Hmm.. I agree with you, Sir!

- 6 years ago

So what is temperature??

- 6 years ago

Average kinetic energy of molecules ?

- 6 years ago

Vibrational kinetic energy of molecules in a body gives the temperature, more energy $\Rightarrow$ more temperature.

And flow of that energy is heat.

- 6 years ago

What is the temperature of vacuum??

- 6 years ago

I guess temperature can not be defined somewhere there is no matter.

- 6 years ago

What if there are radiations but no matter??

- 6 years ago

Radiations can heat up objects but in this case there is nothing to get heated.

If you provide heat through radiations into a vacuum , it will not affect the vaccum, but if you put a thermometer there it will show some reading but that is not the temperature of vaccum.

I am not objecting that vaccum can not contain energy but temperature, nah 😔

- 6 years ago

The temperature of outer space is zero or not defined??? Although google says that it is around 3kelvin..!!

- 6 years ago

Ya its 2.7 Kelvin

- 6 years ago

so is there any matter or vacuum.. ???

- 6 years ago

Minute amount of matter, Super high Vacuum can't be attained.

- 6 years ago

Can you quote any reference which says that absolute vacuum does not exist..!!

- 6 years ago

I read it up in an IUPAP article, in the definition of super high vacuum.

- 6 years ago

Such a vacuum will be of no temperature.

But as you said and I too read about it, bigbag added some background energy to universe and a temperature of 3° above absolute zero.

So not possible to create such a vacuum.

- 6 years ago

Do you mean to say that, there doesn't exist a single point is the space where there is no matter (radiations are there)

- 6 years ago

In a nutshell, Heat (precisely, heat energy), as we all know, is a very common physical quantity, whereas temperature is a measure of this heat energy! =)

- 6 years ago

Temperature of an isolated system can be defined, will it give us the measure of heat energy content in the system??

- 6 years ago