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Solved: A common type of handwarmer contains iron powder that reacts with oxygen to form
Chapter 3, Problem 61P(choose chapter or problem)
A common type of handwarmer contains iron powder that reacts with oxygen to form an oxide of iron. As soon as the handwarmer is exposed to air, the reaction begins and heat is emitted. Is the reaction between the iron and oxygen exothermic or endothermic? Draw an energy diagram showing the relative energies of the reactants and products in the reaction.
Questions & Answers
QUESTION:
A common type of handwarmer contains iron powder that reacts with oxygen to form an oxide of iron. As soon as the handwarmer is exposed to air, the reaction begins and heat is emitted. Is the reaction between the iron and oxygen exothermic or endothermic? Draw an energy diagram showing the relative energies of the reactants and products in the reaction.
ANSWER:Solution 61P
Answer:
Hand warmers work by creating an exothermic chemical reaction that produces heat when the contents react with air or each other. Most commonly, hand warmers use pouches of fine iron filings that oxidize in the presence of air, water and salt, producing heat in the process.