week9-2 - The Flow of Heat There are three basic processes...

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The Flow of Heat There are three basic processes for heat flow: Conduction Convection Radiation
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In conduction , heat flows through a material when objects at different temperatures are placed in contact with one another.
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3B-04 Boiling Water in Cup
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3B-02 Safety Lamp
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In convection , heat is transferred by the motion of a fluid containing thermal energy. Convection is the main method of heating a house. It is also the main method heat is lost from buildings.
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3D-05 Solar Panel 3D-03 Radiation--Match
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In radiation , heat energy is transferred by electromagnetic waves. The electromagnetic waves involved in the transfer of heat lie primarily in the infrared portion of the spectrum. Unlike conduction and convection, which both require a medium to travel through, radiation can take place across a vacuum. For example, the evacuated space in a thermos bottle. The radiation is reduced to a minimum by silvering the facing walls of the evacuated space.
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An ideal gas is a gas for which the forces between atoms are small enough to be ignored. For an ideal gas, abs olute temperature is directly related to the average kinetic energy of the molecules of the system. Most gases behave approximately as ideal gases. If the process is adiabatic , no heat flows into or out of the gas. Even though no heat is added, the temperature of a gas will increase
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week9-2 - The Flow of Heat There are three basic processes...

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