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Recap - Hand Warmer

Part of the Energy, Rates and Equilibrium section of Coddy's Chemistry journey. Lesson 5 of 35.

Challenge

A hand warmer holds iron powder. When its packet is opened, the iron reacts with oxygen from the air and the warmer heats up. For the amount in one warmer the reaction gives out $820\ \mathrm{kJ}$ , and its hump reaches $100\ \mathrm{kJ}$ above the reactants. Say what kind of reaction it is and draw its diagram.

Try it yourself

Energy diagramDraw the energy diagram

All lessons in Energy, Rates and Equilibrium

1Energy in Reactions

Exothermic and Endothermic Energy Diagrams Enthalpy Change Activation EnergyRecap - Hand Warmer

4Rates of Reaction

Collision Theory Concentration and Rate Temperature and Rate Surface Area Catalysts Recap - Speed Trials

7Practice Problems

Recap - Methanol Plant Recap - Butane Lighter Recap - Limestone Kiln

2Bond Energies

Breaking and Making Bonds Delta H from Bond Energies Hess's Law Energy and Moles Recap - Fuel Value

5Equilibrium

Reversible Reactions Dynamic Equilibrium The Equilibrium Constant Writing K Solids and Liquids in K Recap - K Builder

3Changes of State

Heating Curves Melting and Boiling Energy of State Changes Recap - Ice to Steam

6Changing an Equilibrium

Le Chatelier's Principle Changing Concentration Changing Pressure Changing Temperature The Haber Process Recap - Factory Settings