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temperature & energy

Temperature; a vital characteristics of stored energy in molecules. In a sense we can say the effect of energy stored in a molecule is the temperature of the molecule.

In classical thermodynamics, temperature of a gas is nothing but the average kinetic energy of a molecule.

Thermodynamics is the subject which deals with Energy, Equilibrium, Entropy often described as the study of "EEE".

"Molecular Motion" is the theme of thermodynamics.

Thermodynamics is nothing but the energy mechanics ie the movement of energy in the space and time. It is quite evident from the name of the subject. "Thermos" is heat related to temperature and "dynamics" is the motion of it. The manifestation of energy trapped within a body is nothing but the temperature.

I was an observer of nature. The smallest of smalls are the components of the nature too. I still remember the day I first time saw a thermometer, I was badly attacked by viral fever. I remember my aunt told me to clasp a thin pipe of glass, with a glittering substance inside sandwitched by innerside of my left arm and the arm pit. When I asked about the object I was told that it was an instrument, that the instrument measures the magnitude of hotness or coldness and named as "thermometer".

The question that immediately popped up in my mind is that how does it measure the hotness of any object. I asked my teachers at the school, but nothing new had come out, but one thing was common in their reply to my queries and it was that whenever we place an object inside a fire, the object becomes hotter and hotter as temperature would rise and we can measure it as it would produce a rise in mercury columns.

I came to know the exact answer to my queries when I read thermodynamics in the 11th Standard. when I read about kinetic theory of gases, where temperature was defined by the average magnitude of the kinetic energy of the molecules due to their non stop & compulsory motions which was analyzed by Albert Einstein and the phenomenon is called "Brownian Motion".

When we touch a hot body, we feel the temperature as the molecules would transfer kinetic energy to my finger and the energy was converted into heat energy. So "Temperature" of a body is a macroscopic property of the body as a manifestation of energy contained in the whole body and which arises due to continuous bombardment of molecules with a high kinetic energy and transfer a portion of that energy to the body which is converted to heat.

But it must not be the complete explanation as in solids there would not be any 'Brownian Motion' unlike the molecules of a fluid, but despite this solid still have a temperature.

What is the reason of this temperature? Is it still molecular kinetic energy due to which solid posses temperature?

In solid molecules are fixed at lattice points, a molecule needs a large amount of energy to make itself free from the shackles of lattice. But molecules still posses energy as it can still vibrate about its mean point ie. lattice point. This vibrational energy is responsible for solid's temperature.

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