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Do all chemical reaction require activation energy?
Yes, they do.
Can a reaction have zero activation energy?
No, all reactions require some activation energy to proceed, even if it is very small. Activation energy is the minimum amount of energy required for reactant molecules to transform into product molecules.
Is Activation energy the minimum energy needed for a reaction to start?
No, the opposite. The lower the activation barrier the faster the reaction goes. That is how a catalyst speeds up the reaction: by lowering the activation energy.See the Web Links for more information.
Is it true or false that all chemical reactions require an initial input of energy called catalysis?
False. Not all chemical reactions require catalysis. Some reactions occur spontaneously, while others may require an initial input of energy in the form of activation energy. Catalysis is a process that lowers the activation energy required for a reaction to occur, but it is not necessary for all reactions.
What type of reaction releases energy and does not require initial energy to occur?
All reactions require an activation energy. Some appear not to because that energy is provided enough by their temperature. Thus, there is no reaction that does not require any initial energy to occur. A reaction that results in an overall release of energy is called an exothermic reaction.
Why is the activation energy of an endothermic reaction is at least as large as its enthalpy?
The activation energy of an endothermic reaction is at least as large as its enthalpy change because the reactants require a minimum amount of energy to reach the transition state where bond-breaking and bond-forming occur. The enthalpy change represents the overall energy difference between reactants and products but does not account for the energy needed to overcome the energy barrier (activation energy) for the reaction to proceed.
What Activation energy play in a chemical reaction?
It indicates how likely a reaction might be, but there are no hard rules. Low activation energy indicates that the reaction is likely to take place spontaneously. In most cases, the reaction must be exothermic as well. There are lots of exceptions to these simple rules. For any reaction to occur, the reactants must gain at least the activation energy.
Why do reactions require activation energy?
Activation energy is needed to overcome the energy barrier and initiate a chemical reaction. It ensures that reactant molecules have enough energy to break existing bonds and form new ones. Without activation energy, reactions would not proceed efficiently or may not occur at all.
All reactions require activation energy?
Yes, all chemical reactions require an initial input of energy, called activation energy, to start. This energy is needed to break the existing bonds in the reactant molecules and allow new bonds to form to produce the products. Once this energy barrier is overcome, the reaction can proceed on its own.
How do you supply activation energy begin a reaction?
Generally, the activation energy is given by heat, so, you must watch carefully the temperature of the reaction, because you can get undesired products in the reaction, or yielding nothing at all.
Is more energy required for a chemical reaction in the absence of an enzyme?
Without an enzyme, the activation energy needed to start a reaction is much greater. An enzyme is a catalyst, which decreases the amount of activation energy needed to start a reaction. By doing so, it decreases the amount of time the chemical reaction takes place.
How is catalyst enzyme activation energy substrate related?
Enzymes lower the activation energy required for a reaction to occur by providing an alternative pathway for the reaction. This enables substrates to be converted into products more efficiently. Catalysts, including enzymes, speed up reactions by lowering the activation energy barrier, making the reaction proceed at a faster rate. Thus, the relationship between catalysts, enzyme activation energy, and substrates is that enzymes act as catalysts to reduce the activation energy needed for substrates to undergo a chemical reaction.
