Look at the following enthalpy diagram. Select all that apply. A.)The products have more energy than the reactants.
B.)This is an addition reaction.
C.)A large activation energy is required for this reaction to take place.
D.)The products are more stable than the reactants.
E.)This is a substitution reaction.

You may have more than one answer.

not clear

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.