By ECZ Study Tool, September 23, 2023
An endothermic reaction is a chemical reaction that absorbs heat energy from its surroundings. Think of it as a 'heat-absorbing' reaction where the products of the reaction have higher energy than the reactants. Endothermic reactions often feel cool to the touch and may require an external heat source to occur.
In endothermic reactions, energy is
taken in from the surroundings and stored within the products of the reaction.
This energy can come from various sources, including heat, electrical energy, or
other forms of external work.
Key points about endothermic reactions include:
Heat Absorption: Endothermic reactions absorb heat energy, causing
their surroundings to cool down. They often feel cold to the touch.
Non-Spontaneous: Endothermic reactions typically do not occur
spontaneously at room temperature. Instead, they require an external source of
energy, such as heating, to initiate the reaction.
Examples: Common examples of endothermic reactions include the
dissolution of certain salts in water, such as ammonium nitrate which is used
in cold packs for injuries and the process of photosynthesis in plants, where
energy from sunlight is absorbed.
Applications: Endothermic reactions are used in various
applications, including cooling systems example refrigeration and chemical
processes that require the absorption of heat.
Understanding endothermic reactions
is essential for controlling temperature changes in chemical processes and for
applications where heat absorption is required.
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