Everything you need to know for the Temperature Topic of the OCR A Level Physics course, but also all completely relevant for other exam boards.

This video covers:
Thermal Equilibrium – objects at the same temperature have no net transfer of energy.
The Zeroth Law of Thermodynamics – if body two objects are in thermal equilibrium with a third object then they must also be in thermal equilibrium with each other.
Absolute Temperature - is proportional to average kinetic energy of the molecules. Absolute temperature does not depend on what substance it is!
For example water or copper molecules, at the same temperature the molecules of each would have the same average kinetic energies. One substance may have more internal energy but same average kinetic energy of the molecules.

It goes into detail for:
Thermodynamics 1 is the idea that all things tend towards thermal equilibrium (i.e heat dissipates) in a closed system, this also encapsulates the law of conservation of energy.
Thermodynamics 2 defines heating, heat moves from hot to cold and the rate of that transfer is proportional to an energy difference.
Thermodynamics 3 defines absolute zero, and that it would be the same for all substances if the molecules could have zero kinetic energy. -273.15°C or 0K.


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