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• It’s Hot!!!• Heat “flows” from Hot to Cold!
– Which is the same as saying energy goes from areas of high energy density to areas of low energy density… it spreads out!
Temperature
• The average Kinetic Energy of a substance
• Everything is wiggling!!!!!
There are 3 kinds of Heat Transfer
• Conduction
• Convection
• Radiation
Convection at work
• Heating up a fluid causes its density to decrease – it is more bouyant, so it moves up. Cooler material is denser and moves down.
• Just like in Kona! The sun heats up the mountain, the air moves upslope – and condenses to form clouds – keeping the coffee plants shaded!
Convection
Conduction
• Atom to Atom energy transfer – some are better than others at moving energy
• Bi-Metallic strip demo
Radiation
• Electromagnetic Radiation
• Infrared
• Boiling Melting• Condensation Radiation• Conduction Sublimation• Convection Phase• Evaporation Phase change• Freezing Absorption• Heat of fusion Entropy• Heat of vaporization