3. Chemical Foundations

Chemical Energetics — Quiz

Test your understanding of chemical energetics with 5 practice questions.

Practice Questions

Question 1

Which of the following statements accurately describes the energy changes involved in the formation and breaking of chemical bonds during a reaction?

Question 2

Consider a reaction with an enthalpy change ($\Delta H$) of $-250 \text{ kJ/mol}$ and an activation energy ($E_a$) of $100 \text{ kJ/mol}$. What is the activation energy for the reverse reaction?

Question 3

In an energy profile diagram, what does the difference in energy between the reactants and the transition state represent?

Question 4

A chemical reaction has an enthalpy change of $-75 \text{ kJ/mol}$. If the total energy required to break bonds in the reactants is $400 \text{ kJ/mol}$, what is the total energy released during the formation of bonds in the products?

Question 5

Which of the following statements correctly describes the effect of a catalyst on a chemical reaction?