The meaning of temperature
Energy flowing from a region of higher temperature to a region of lower temperature is called thermal energy.
Thermometer in water example.
When two objects are in contact and are at the same temperature and there is no transfer of thermal energy between them - thermal equilibrium.

Thermodynamic (Kelvin) scale
It is not possible to have a temperature lower than 0K (absolute zero). For any matter at absolute zero, you can't remove any more energy from it. Absolute zero is the temperature at which all substances have minimum internal energy (the KE and electrical potential energy of the particles is minimum).

T (K) = θ (°C) + 273
θ (°C) = T (K) - 273

Thermodynamic scale fixed points:

absolute zero - 0K
triple point - temperature at which water, ice and water vapour can coexist at 273K

	Created by Shpat Agushi over 8 years ago

Revision slide set covering all key material of Thermal Physics