Temperature, Heat and Thermal Expansion

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Presentation transcript:

Temperature, Heat and Thermal Expansion

Internal Energy

Thermal Energy

Temperature Measures the Thermal Energy of Material Related to the average KE of the atoms/molecules

Temperature Scales Fahrenheit Celsius Kelvin

Objects that exchange thermal energy are said to be in thermal contact

Heat Energy transferred between two objects in thermal contact that are at different temperatures

Thermal Equilibrium Objects in Thermal Contact will reach the same temperature – The objects are then in Thermal Equilibrium.

Zeroth Law of Thermodynamics If A and B are objects in thermal equilibrium with a third object C, then A and B are in thermal equilibrium with each other

Methods of Heat Transfer Conduction Convection Radiation

Conduction Heat

Convection Air

Radiation

Thermal Expansion As the temperature of a material increases, the average molecular speed increases which in turn generally increases the volume of the material

Linear Expansion

Linear Expansion in 2D After Before

Expansion of a Hole

Area Expansion

Volume Expansion Regular Solid In General