Joule's Experiment and the First Law of Thermodynamics

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Joule's experiment demonstrated the validity of the first law of thermodynamics. Electrical or mechanical energy can be converted into thermal energy, but the total amount of energy is conserved. In this Demonstration, the amount of heat in joules generated in a circuit element of resistance
(immersion heater) is measured by a calorimeter. Assume that all the heat is absorbed by the water and measure the temperature increase from
to
. Then
Contributed by: Anping Zeng (June 2015)
Open content licensed under CC BY-NC-SA
Snapshots
Details
Snapshot 1: only heating time into 240 s
Snapshot 2: only voltage
into 4.85 V
Snapshot 3: only depth of water into 7.5 cm
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