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In combination reactions, multiple reactants combine to form a new single product, often accompanied by energy changes such as heat release. Examples of combination reactions include the reaction of calcium oxide with water to form calcium hydroxide, and the formation of water from hydrogen and oxygen.
In this section, combination reactions are defined as chemical reactions in which two or more substances combine to form a single new product. A prominent example includes the reaction of calcium oxide (quick lime) with water to form calcium hydroxide (slaked lime), releasing heat in the process. This type of reaction is also classified as an exothermic reaction because it releases energy in the form of heat. The section also highlights other combination reactions such as the burning of coal and the formation of water from its elemental gases, emphasizing the commonality of this reaction type in various chemical processes. Understanding combination reactions is essential for grasping how substances interact and transform in chemical reactions, which is foundational to the study of chemistry.
Combination Reaction: Two or more substances combine to form a single product.
Exothermic: Heat is released during certain reactions.
Reactants vs. Products: Understand the difference between substances involved in the reaction.
Combine and create, one product is great!
Imagine cooking a meal where ingredients blend to create a delicious dish – that’s like a combination reaction in chemistry!
CR for Combination Reaction: Combine Reactants into one Product.
Calcium oxide plus water yields calcium hydroxide and heat.
Hydrogen gas and oxygen gas yield water.
Term: Combination Reaction
Definition: A reaction where two or more substances combine to form a single product.
A reaction where two or more substances combine to form a single product.
Term: Exothermic Reaction
Definition: A chemical reaction that releases heat.
A chemical reaction that releases heat.
Term: Reactants
Definition: Substances that undergo chemical change in a reaction.
Substances that undergo chemical change in a reaction.
Term: Product
Definition: The new substance formed as a result of a chemical reaction.
The new substance formed as a result of a chemical reaction.