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When a endothermic reaction happens, you may be able to notice a drop in temperature. Sometimes, endothermic reactions need more energy than they can get from their surroundings. In those cases, energy must be added as heat to cause the reaction to take place.
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Wiki User
∙ 14y ago
Wiki User
∙ 15y agoNot all chemical reactions will make a substance's temperature drop. Some do and some do the opposite (releasing heat). There are two main categories of chemical reactions with respect to heat.
Exothermic, where heat is released into the environment. Exo means out (think export) and thermic means heat (think thermal blanket). If you are ever doing a lab and you feel the bottom of the beaker/flask and it is hot/warm, then the reaction is exothermic.
Endothermic, where heat is absorbed. Eno means inside (think taken in). You can identify an endothermic reaction by a noticeable loss of heat during the experiment.
Wiki User
∙ 13y agoA change in entropy. Energy is comprised of enthalpy and entropy deltaE = deltaH - TdeltaS where deltaE is change in energy, deltaH change in enthalpy, T is temperature and deltaS is change in entropy. If a reaction is endothermic then there must be a corresponding increase in entropy.
For example some salts when they dissolve in water are endothermic - this change is driven by the fact that there is a massive increase in entropy to go from an ordered salt crystal to a dissordered, dissolved salt solution.
Wiki User
∙ 13y agoAn endothermic reaction requires energy to react, so sometimes it absorbs the heat in its environment to jumpstart the reaction.
Wiki User
∙ 11y agothe temperature decreases.
Wiki User
∙ 11y agobecause shutup
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When energy is absorbed during a chemical reaction the reaction is classified as what reaction?
endothermic reaction
What is heat During the endothermic reaction?
The heat spreads to the colder substance until the two are at an equillibrium (the two objects at the end will have the same temperature)
What is a type of chemical reaction where the energy of the products is less than the energy of the reactants?
When a reaction has products that have a lower temperature than the reactants did, the reaction is endothermic.
How do you distinguish exothermic and endothermic processes?
By whether heat is released or absorbed during the reaction.
What would you expect from an endothermic reaction?
Endothermic reactions are characterized by the release of heat during the reaction. A typical example is the combustion of methane, which when combined with oxygen releases water and carbon dioxide.
What happens to heat during an endothermic reaction?
Heat is absorbed.
What happens during an exothermic reaction?
Exothermic reaction is a reaction which gives out heat. For example: when natural gas burns it release its energy to the surroundings which could be the water in a central heating system. this is a EXOTHERMIC REACTION between natural gas and oxygen.
When energy is absorbed during a chemical reaction the reaction is classified as what reaction?
endothermic reaction
Which of these occurs during an endothermic reaction?
energy is absorbed
What is heat During the endothermic reaction?
The heat spreads to the colder substance until the two are at an equillibrium (the two objects at the end will have the same temperature)
Is endothermic a chemical reaction?
Yes. A chemical reaction which absorbs heat during the reaction. The opposite to exothermic which releases heat during the reaction.
What happens to the reaction during endothermic and exothermic reaction?
During an endothermic reaction, heat is absorbed from the surroundings, causing the reaction to feel cold. The reactants have less energy than the products, so energy is absorbed to form the products. In an exothermic reaction, heat is released into the surroundings, making the reaction feel hot. The reactants have more energy than the products, so energy is released during the reaction.
What is the type of heat reaction which occurs when heat is given off by the reaction?
Heat is released during an exothermic reaction.
Is typical of an endothermic reaction?
Endothermic reactions are characterized by the release of heat during the reaction. A typical example is the combustion of methane, which when combined with oxygen releases water and carbon dioxide.
What is a type of chemical reaction where the energy of the products is less than the energy of the reactants?
When a reaction has products that have a lower temperature than the reactants did, the reaction is endothermic.
How do you distinguish exothermic and endothermic processes?
By whether heat is released or absorbed during the reaction.
Is energy absorbed during preparation of a mixture?
Depends on the mixture. There are two different reactions when atoms bond: exothermic and endothermic. During an exothermic reaction, energy is given off in the form of heat or light. In a endothermic reaction, energy is absorbed.
