Thermal physics is the combined study of thermodynamics, statistical mechanics, and kinetic theory. It is mostly about the study of 'heat'.


In physics, thermodynamics is the study of the conversion of heat energy into different forms of energy (eg.mechanical, chemical, and electrical energy); different energy conversions into heat energy; and its relation to variables such as temperature, pressure, and volume. Roughly, heat means "energy in transit" and dynamics relates to "movement"; thus, in essence thermodynamics studies the movement of energy and how energy instills movement.

There are 3 laws in thermodynamics.
They are:
1.The change in the internal energy of a closed thermodynamic system is equal to the sum of the amount of heat energy supplied to the system and the work done on the system

2.The total entropy of any isolated thermodynamic system tends to increase over time, approaching a maximum value.

3.As a system asymptotically approaches absolute zero of temperature all processes virtually cease and the entropy of the system asymptotically approaches a minimum value; also stated as: "the entropy of all systems and of all states of a system is zero at absolute zero" or equivalently "it is impossible to reach the absolute zero of temperature by any finite number of processes".

Basically, in Law 1 , it shows that the the internal energy is the same as the amount of heat supplied and the work done.
In law 2,entrophy is a measure of disorder in the system,meaning that the disorder tends to increase when it reaches maximum value.
In law 3,when the temperature of the system reaches absolute zero , the system cannot be operated and that a system cannot NEVER reach absolute zero in any process.



This is a video about heat transfer:



hope everyone know more about thermadynamics/thermalphysics. :D