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Electrical Equivalent of Heat Experiment, PASPORT

  • Hand-Cranked Generator provides tactile experience
  • Power is plotted as work is done
  • See the temperature rise

Electrical Equivalent of Heat Experiment, PASPORT

EX-9962

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Electric Equivalent of Heat Experiment

Nothing reinforces the relationship between mechanical work and heat better than hand cranking a generator to produce electricity and electrically heating water.

With the PASCO Hand Crank Generator, Calorimeter and the Xplorer GLX to measure temperature and voltage, turns a qualitative demonstration into a quantitative experiment.

The student cranks the generator by hand, causing a current to flow through the heating resistor. The dissipated heat warms the water in the calorimetry cup.

The amount of electrical energy used to heat the water is equal to the area under the power versus time curve. The amount of heat delivered to the water can be calculated using the increase in temperature and the mass of the water. The comparison of the electrical energy to the heat results in a value for the number of Joules in a calorie.

This experiment is available for Download at no additional cost.

 

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The top graph displays the power output from the generator and the bottom graph the increase in temperature. The amount of electrical energy used to heat the water is determined by finding the area under the power versus time curve.

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