| Description |
The fact that chemical reactions could liberate energy in the form of electricity was first demonstrated by the Italian scientists Galvani and Volta. The reaction between zinc and iodine is used to illustrate that either heat or electricity can be obtained. Several types of electrical cells or batteries are shown. An explanation is given of the action of an automobile storage battery. | Uses laboratory Experiments to illustrate how chemicals liberate energy in the form of electricity. Explains the part Italians Galvani and Volta played in discovering the principle of electricity from chemicals. Demonstrates the reaction between zinc and lead in generating heat and electricity. Shows the types of electrical cells uses today. (KQED) Film.
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