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

Question

anonymous · Answer

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)..

anonymous · Answer

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..

anonymous · Answer

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.