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Physics 7 Online
OpenStudy (anonymous):

All chemical reactions involve a transfer of energy.(Points : 2)

OpenStudy (anonymous):

True, chemical reactions either give of energy (usually in the form of heat) or need energy to occur (usually noticeable because the material gets colder)..

OpenStudy (anonymous):

Extra information: a reaction that gives of heat is exothermic while a reaction that needs energy (heat) is endothermic.. The energy source involved is usually heat as stated before but UV-light or other energy sources can do the trick as well..

OpenStudy (anonymous):

Yes, chemical reactions involves transfer of energy because chemical reactions involves breaking and forming of bonds . Breaking of bonds absorbs energy and formation of bonds releases energy.

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