Olivia investigated different kinds of chemical changes using substances she found in her kitchen so she could see these changes, which of the following things will she NOT see happen? a. new bonds form

b. existing bonds break

c. new substances form

d. changes dont effect matter

The correct answer is b

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.