Why do reactions either give out or absorb heat?
1 mark · EasyState what happens to energy when chemical bonds are formed.
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Energy is released.
Also accept: Energy released; Heat is released; Bonds releasing energy
Common mistakes: Energy is absorbed
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Marking points
B1 · 1 mark · States that energy is released (or equivalent) during bond formation.
Worked solution
Energy is released when chemical bonds are formed.