Essentials of Heat Transfer Dynamics

1.Definition of Heat

Heat in physics refers to the transfer of thermal energy from one object to another due to a temperature difference.

Science of Heat


It involves the transfer of thermal energy from a hotter object to a cooler one. Thermal energy is the form of energy being transferred.

Examples of Heat


Examples include sunlight warming the Earth, a burning candle emitting heat energy, and thermal energy in particles within a substance.



Temperature is not just about how hot or cold something feels; it's a measure of the average kinetic energy of particles in an object.

Measurement of Temperature


Temperature is measured using a thermometer, which operates based on thermal expansion.

Methods of Thermal Energy Transfer


Thermal energy can be transferred through conduction (direct contact), convection (movement of liquids or gases), and radiation (electromagnetic waves).

States of Matter and Changes


Matter exists in three states: solid, liquid, and gas. Heat can cause changes between these states (physical changes) or initiate chemical reactions (chemical changes).

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