Pure copper Pennie’s (those minted prior to 1982) have a hidden secret: you can use them like little heaters! This works because when copper is heated, it will catalyze the oxidation of ketones (I use acetone here) which releases a lot of heat, enough to keep the penny glowing red hot as the reaction occurs on its surface! #chemistry #chemteacherphil | Chemteacherphil

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