Multiple choice

A chemical, when burned, produces energy if

  1. the energy absorbed by reactants is more than the energy released by products

  2. the energy absorbed by reactants is less than the energy released by products

  3. the energy released by products is equal to energy absorbed by reactants

  4. it reacts with carbon dioxide

  5. none of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Yes, when the energy absorbed by reactants is less than energy released by products.