Wize High School Grade 12 Chemistry Textbook > Energy Changes
0th Law of Thermodynamics
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0th Law of Thermodynamics
- 0th law: If a body, A, is in thermal equilibrium with a second body, B, and that body is in thermal equilibrium with a third body, C, then A and C are in thermal equilibrium.
- If two bodies/systems are in thermal equilibrium with one another, it means they are at the same temperature!
What is the difference between thermal equilibrium and temperature?
Thermal equilibrium: When two substances are in physical contact and exchange no heat energy with one another.
Temperature: A measure of the average kinetic energy of the particles in a sample of matter
Increasing the temperature means that average kinetic energy of the particles will (increase/decrease)
increase
. 