Saturday, August 13, 2011

Physics Form 4: Chapter 4 - Thermal Equilibrium

When two substances having different temperatures are introduced or kept together, heat energy flows from a substance at higher temperature to a substance at lower temperature. Also, heat continues to be transferred till their temperatures are equalized.

  • Thermal equilibrium is the situation where there is no net heat flow between the two bodies at the same temperature.
  • That is the rate of heat absorption equals to the rate of heat dissipation at the same temperature.
  • Two bodies are said to be in thermal equilibrium when:
a)      they are at same temperature
            b)    the net rate of heat flow between them is zero.

Click on the diagram below to play!

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