18
Temperature and Heat
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•Thermal energy is “kinetic energy” of moving atoms and molecules
–Hot material energy has more energy available which can be used for
•Chemical reactions
•Nuclear reactions (at very high temperature)
•Escape of gasses from planetary atmospheres
•Creation of light
–Collision bumps electron up to higher energy orbit
–It emits extra energy as light when it drops back down to lower energy orbit
–(Reverse can happen in absorption of light)