See hot and cold water mix in infrared.

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Read more: Mixing Hot and Cold in Infrared Vision

Methanol is ignited to expel a rubber stopper.  

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Read more: Methanol Rocket

Description:

Ice cubes melt at different rates depending on the thermal conductivity of the material they are resting upon. 

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Read more: "Seeing" Thermal Conductivity

See the work done by an expanding volume.

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Read more: Work Done by Expanding Air