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An exergonic reaction is activation energy (or energy of activation).

An endergonic reaction is essentially the opposite of an exergonic reaction.

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13y ago

the energy of activation

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Activation Energy.

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Activation Energy

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Q: What is it called when energy is required to start a chemical reaction?
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Related questions

In a chemical reaction what does it take energy to do?

For most chemical reactions, energy is required to supply an "activation energy" required before reaction.


Start up energy of a chemical reaction?

Energy that starts a chemical reaction is called activation energy


The energy necessary to start a chemical reaction?

The energy necessary to initiate a chemical reaction is called "activation energy."


What is activators used for?

Activation energy in chemistry is the amount of energy required to start a reaction. For every chemical reaction, a certain amount of energy is required to start it


A chemical reaction that releases energy is called?

Exothermic reactions


How a enzymes catalyze a chemical reaction?

they reduce the activation energy required for the reaction to occur


What decreases activation energy needed for a chemical reaction?

The presence of a catalyst in a reaction will lower the activation energy required to complete the reaction. The catalyst is not used up in the reaction, it is just there to speed it up.


Chemical reaction that releases energy?

All chemical reactions that release energy in the form of heat are called exothermic reactions.


The amount of energy needed to start a chemical reaction is called what?

The energy required is called the activation energy. The minimum amount of energy needed to start a chemical reaction is given by the formula Ea=-RT*ln(k/A). R is the universal gas constant, T is temperature in Kelvin, k is the reaction rate coefficient and A is the frequency factor.


What chemical reaction produces heat and energy in a star?

it is not a chemical reaction. It is a nuclear reaction and it is called fusion.


What is the type of chemical reaction in which heat energy is absorbed?

Endothermic reactions.Endo- means 'inside' which is where the energy ends up.Exothermic reactions give off energy. Exo- means 'outside'. Think that a spider sheds an 'exo'skeleton, or a skin on the outside.


The amount of energy available to do work after a chemical reaction has occurred is called?

Chemical energy