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The main differences between exothermic reactions and endothermic reactions are:
Exothermic reactions are reactions that give off energy (light, electrical or mainly heat), causing the surroundings to warm up. Endothermic reactions are reactions that absorb energy, causing the surroundings to cool down.
The products of an exothermic reaction have less energy, or less total enthalpy, than of it's reactants. This is due to the reactants containing more stored energy because energy from external sources is not required. This also gives the products more stability because in order to achieve a reversible reaction and break the chemical bonds of the products, you will need to apply more energy to it.
The opposite is for endothermic reactions. The products of the reaction have a greater total enthalpy of the reactants, causing the reactants stored energy to decrease. This produces less stable products that need less energy to break their bonds in a reversible reaction.
Finally most exothermic reactions are spontaneous, where as most endothermic reactions are not spontaneous as they generally need energy applied to them before they start.
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CoachEndothermic reactions absorb heat from their surroundings, causing a decrease in temperature, while exothermic reactions release heat into their surroundings, causing an increase in temperature. An example of an endothermic reaction is the reaction between ammonium nitrate and water, while an example of an exothermic reaction is the combustion of gasoline.
Examples for exothermic reaction:
- fermentation is a example of exothermic reaction
- combustion reaction of fuels
- adding concentrated acid to water
- most polymerisation reaction
- burning of substance
- photosynthesis
- a chemical cold pack consisting primarily of ammonium nitrate and water
- evaporation of water
- preparation of ozone by passing silent electric discharged through oxygen
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Do all acid reactions give off heat?
Not all acid reactions give off heat. Some acid reactions are endothermic, meaning they absorb heat from the surroundings instead of releasing it. Examples of endothermic acid reactions include the reaction of citric acid with water.
Examples of endothermic and exothermic reactions?
An example of an endothermic reaction is the reaction between ammonium nitrate and water, which absorbs heat from the surroundings, causing the mixture to feel cold to the touch. An example of an exothermic reaction is the combustion of methane gas with oxygen, which releases heat into the surroundings, causing the surroundings to feel warmer.
What is the type of chemical reaction in which heat energy is absorbed?
An endothermic reaction is a type of chemical reaction in which heat energy is absorbed from the surroundings. This results in a decrease in temperature of the surroundings and an increase in the energy of the reactants.
What is the difference between endothermic and exothermic And give examples?
Chemical reactions that release energy in the form of heat, light, or sound are called exothermic reactions. Example: Mixture of sodium and chlorine to yield table salt In other words, combination reactions are exothermic. Reactions that absorb energy or require energy in order to proceed are called endothermic reactions. For example: In the process of photosynthesis, plants use the energy from the sun to convert carbon dioxide and water to glucose and oxygen.
What is a exotermic reaction?
An exothermic reaction is a chemical reaction that releases energy to its surroundings in the form of heat. This type of reaction typically results in a temperature increase in the surrounding environment. Examples of exothermic reactions include combustion and many neutralization reactions.
