Eduard-Job-Foundation for Thermo- and Matterdynamics

Annealing of Silver Oxide

Experiment: Annealing of Silver Oxide

Procedure:
Blackish brown silver oxide is heated by a burner.

Observation:
The oxygen that forms can be demonstrated with a glowing splint. White shiny silver metal remains in the test tube.

Explanation:
The thermal decomposition of silver oxide can be described by:

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The decomposition does not take place at room temperature because there exists no potential drop.

However, since a gas, that means a substance with strongly negative temperature coefficient α, should be formed we expect that this process will begin at a high enough temperature.

Video (mpg4, 1:07)