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As mentioned in the previous section, every chemical change involves energy change. Either exothermic, where heat is released or or endothermic which is the absorption. Some are quite noticeable, such as fireworks, where others are quite unnoticeable, such as rusting. Rust, or iron oxide, forms when iron combines with oxygen. This is corrosion.
Understanding how chemical reactions are impacted by the combination of 2 or more chemicals engineers understand how to make products so they can release or absorb this energy safely and effectively.
Automobiles and Exothermic Reactions
When you turn the key or push the button to start the car combustion reaction takes place. Pistons move up and down as a result of thousands of controlled explosions. In a four-stroke engine, the strokes are called: intake, compression, power, and exhaust.
Hot and Cold Packs
Endothermic reaction
Batteries
Exothermic Reaction
Which chemical reaction has a nearly unnoticeable energy change?
Energy from burning gasoline in a car engine results mainly in which two types of energy?
Give two examples of an exothermic reaction and two examples of an endothermic reaction.
How do exothermic and endothermic reactions differ?
How are they similar?
Some exothermic reactions can be quite dangerous. Give the reason behind the statement.
Fossil fuel is combined with oxygen to produce carbon dioxide and water. We often think of these reactions as burning reactions. Are they exothermic or endothermic?
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