8. Thermochemistry

In a reaction energy diagram, which label represents the overall enthalpy change (ΔH), and how can you determine if the reaction is exothermic or endothermic?

Given the reaction: 2H_2(g) + O_2(g) ightarrow 2H_2O(l), predict whether this reaction is exothermic or endothermic.

When ammonium chloride (NH_4Cl) dissolves in water, the temperature of the solution decreases. Is this process endothermic or exothermic?

Which of the following best describes what happens in an exothermic reaction?

Which of the following describes an exothermic reaction?

Which of the following reactions releases energy?

In which one of the following processes is the system endothermic?

For an exothermic solution process, which of the following statements is true?

Which of the following best describes the enthalpy change (ΔH) associated with an endothermic reaction?

Which of the following processes is an example of an endothermic process?

Which statement best describes the difference between endothermic and exothermic reactions?

Which of the following reactions is exothermic?

Which of the following best describes the process of freezing water?

Which statement is true about endothermic and exothermic reactions?

Which of the following energy profile diagrams best illustrates an endothermic reaction with high activation energy?