8 Questions
Las reacciones de síntesis siempre involucran la formación de dos productos.
False
Las reacciones de descomposición siempre liberan energía.
False
Todas las reacciones de combustión producen dióxido de carbono y agua.
True
En una reacción de desplazamiento simple, un compuesto se descompone en dos elementos.
False
Las reacciones de síntesis siempre son exotérmicas.
True
Las reacciones de descomposición siempre producen un solo producto.
False
Todas las reacciones de combustión involucran oxígeno como reactante.
True
En una reacción de desplazamiento simple, un elemento se descompone en dos productos.
False
Study Notes
Chemical Reactions
Synthesis Reactions
- A reaction where two or more substances combine to form a new compound
- General equation: A + B → AB
- Example: 2H2 + O2 → 2H2O (hydrogen and oxygen combine to form water)
- Characteristics:
- Two reactants form one product
- Often releases energy (exothermic)
Decomposition Reactions
- A reaction where a single compound breaks down into two or more simpler substances
- General equation: AB → A + B
- Example: 2H2O → 2H2 + O2 (water breaks down into hydrogen and oxygen)
- Characteristics:
- One reactant forms two or more products
- Often absorbs energy (endothermic)
Combustion Reactions
- A reaction where a substance reacts with oxygen to produce heat and light
- General equation: Fuel + O2 → Products (CO2, H2O, etc.)
- Example: 2CH4 + 3O2 → 2CO2 + 3H2O (methane burns in oxygen to produce carbon dioxide and water)
- Characteristics:
- Involves oxygen as a reactant
- Releases heat and light energy
- Often produces CO2 and H2O as products
Single Displacement Reactions
- A reaction where one element displaces another element from a compound
- General equation: A + BC → AC + B
- Example: Zn + CuSO4 → ZnSO4 + Cu (zinc displaces copper from copper sulfate)
- Characteristics:
- One element replaces another element in a compound
- Often forms a new compound and a pure element as products
Learn about the different types of chemical reactions, including synthesis, decomposition, combustion, and single displacement reactions. Understand the general equations and characteristics of each type.
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