• 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