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Questions & Answers
QUESTION:
Define heat.
ANSWER:Step 1 of 3
When two substances are kept at different temperatures, energy transfer occurs from the body at a higher temperature to the substance at a lower temperature. This energy flow is called heat.
Particles of a substance are in continuous vibration. When the temperature of a substance is increased, the particles vibrate with a higher frequency. Heat stored in that system increases, which is the energy of vibration.
These particles with higher velocity transfer energy to the particles with lower energy. The heat content of a substance determines the temperature of the substance.
The heat content is measured in joules, and the symbol of heat is Q.