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Charles Law


Summary:  A sealed bulb is warmed with body heat from hands.  The increase in pressure in the bulb increases, demonstrated as a column of water is displaced.


Charles Law apparatus

Large crystallizing dish

Warm water (or hands)


The gas inside the bulb can be expanded by using a warm water bath or simply by using your hands (vigorously rubbing your hands together will increase their heat). Make sure the system is closed before expanding the gas.


To schedule a demonstration, please send an email to the demonstration lab.



Eric Camp

Lecture Demonstration Technician

Bagley Hall 171

(206) 543-1606


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