## HELLSGUARDIAN 3 years ago I got this question in my exam but could not answer it.its not even at google.. Q- What are the limitations of zeroth law of thermodynamics?

1. eashmore

Let's see.... The zeroth law just basically defines temperature. It saws that if bodies A and B are in thermal equilibrium (they have the same temperature), and B is in thermal equilibrium with C, then A is in thermal equilibrium with C, too. I would argue that there are no limitations for this reason: The zeroth law was sort of an after thought. Scientists had been studying heat and thermal energy for years and then realized it would be beneficial to to be able to define a way to quantify thermal energy. I believe it was first stated after the first and second laws were proven. In application, the law says that if we measure the temperature of two bodies and they have the same temperature, they are in thermal equilibrium. It also allows us to measure temperature because it proves that if we place a thermometer in a hot bath of water, for example, the thermometer will reach equilibrium with the water. This is indicated when the thermometer stops changing temperature. I'll look into this more and see if I can uncover anything.

2. HELLSGUARDIAN

Please see to it..It would be very helpful..:)

3. eashmore

Perhaps your professor meant to say "limitations of the first law?" There are definitely a few. The second law does not have any except that it is very statistical.

4. HELLSGUARDIAN

i dont think he meant this..i confirmed it..:)

5. HELLSGUARDIAN

okay i got the answer. Perhaps, there is an innate assumption that systems to an equilibrium state spontaneously is the limitation. but physically no system reaches equilibrium spontaneously hence we can say that there is no limitation of zeroth law..:)