Bronze steam boiler and voltaic pile: what they have in common

1. Step 1. Bronze steam boiler — is part of — Heron’s aeolipile. A vessel of boiling water.
2. Step 2. Heron’s aeolipile — uses — Combustion. A fire boils the water in the cauldron.
3. Step 3. Combustion — is a kind of — Oxidation. Combustion is rapid oxidation.
4. Step 4. Oxidation — is used in — Electrochemical reaction. Redox reactions.
5. Step 5. Electrochemical reaction — is used in — Voltaic pile. Current arises from the reaction of dissimilar metals with an electrolyte.

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