How is energy involved in chemical and physical changes ?

Physical and chemical changes are associated with energy changes.

For this we have to understand the type of changes.

1. Exothermic :- These are the changes that release energy when they occur .

2. Endothermic :- The changes that occur by absorbing the energy are the endothermic .

In case of chemical change the reaction proceeds by crossing an energy barrier.

for the conversion of reactant into products there is a minimum required energy that is called threshold energy. If the reactant do not have threshold energy , the reaction will not take place.

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I am M.Sc (chemistry ) from punjabi university. I am a science teacher with expertise in chemistry, with 8 years of experiance in teaching. i am getting a handsome salary , now i wish to help out the people who need me UNCONDITIONALLY. and I am constantly working on creating a new and easy way of learning the tough things in an effective way. I am constantly working to make authentic and reliable information to be shared with my students and widen the horizons of knowledge.

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