Question

chemical a and chemical b react in an exothermic reaction. what can be known about what will happen when chemical a and chemical b are mixed together? the old substance will need more energy to break its chemical bonds than the new substance will release. more energy will be released from the old substance than the new substance will release to form its chemical bonds. the color will change as a result of the reaction. the substance will bubble as a result of the reaction.

Explanation:

In an exothermic reaction, more energy is released when new - chemical bonds are formed in the products than is absorbed to break the chemical bonds in the reactants. Color change and bubbling are not definitive indicators of an exothermic reaction.

Answer:

More energy will be released from the old substance than the new substance will release to form its chemical bonds.