Question

a student drew and labeled the graph based on the results of an experiment. why did the student include the labels activation energy and energy released? a) to explain why the experiment gave off heat b) to explain why carbon dioxide and water react to form methane and oxygen c) to explain why methane and oxygen react to form carbon dioxide and water d) to show that the reaction needed heat to occur

Explanation:

Activation energy is the minimum energy required for a chemical reaction to occur. The label 'activation energy' on the graph shows the energy barrier that needs to be overcome for methane and oxygen to react to form carbon - dioxide and water. The 'energy released' label shows the net energy change of the exothermic reaction.

Answer:

D. to show that the reaction needed heat to occur