chemical changes

Asked by aayushverma | 16th Mar, 2008, 07:43: PM

Expert Answer:

all chemical changes require energy to b initiated as for the initial breakage of bonds of reactants .

bt if energy released in a reaction is more then that required it is exothermic reaction n released energy is used to carry on the reaction nnet energy is released.

for endothermic reaction energy is supplied to initiate as well as carry on the reaction 

Answered by  | 17th Apr, 2008, 03:35: PM

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