What is true about energy?

Energy cannot be created during an ordinary chemical reaction.

Energy is used up during an explosion.

There is more energy after a chemical reaction than before the reaction.

When water melts, energy is created in the form of heat.

Question

What is true about energy?

 Energy cannot be created during an ordinary chemical reaction.

 Energy is used up during an explosion.

 There is more energy after a chemical reaction than before the reaction.

 When water melts, energy is created in the form of heat.

anonymous · Answer

Energy cannot be created during an ordinary chemical reaction.

anonymous · Answer

http://simple.wikipedia.org/wiki/Conservation_of_energy