Energy and Heat Vocabulary

Which type of reaction releases energy to the surroundings?

• Endothermic reaction

• Exothermic reaction

• Neutral reaction

• Spontaneous reaction

What is the direction of energy change in an endothermic reaction?

• Energy increases

• Energy decreases

• Energy remains constant

• Energy fluctuates

Which graph represents an endothermic reaction?

• The graph with energy absorbed

• The graph with energy released

• The graph with constant energy

• The graph with fluctuating energy

Which graph represents an exothermic reaction?

• The graph with energy released

• The graph with energy absorbed

• The graph with constant energy

• The graph with fluctuating energy

Which of the following best describes the system boundary in an exothermic reaction?

• It is where energy is absorbed

• It separates the system from the surroundings

• It is where energy is created

• It is where energy is destroyed

What does the term "system" refer to in the context of an exothermic reaction?

• The reactants

• The products

• The surroundings

• The energy

Which of the following statements is true for an exothermic reaction?

• The system gains energy

• The system loses energy

• The system remains unchanged

• The system creates energy

Which of the following is an example of chemical energy?

• A moving car

• A lit candle

• A battery

• A running fan

What happens to chemical energy during a chemical reaction?

• It is destroyed

• It is converted to another form

• It remains unchanged

• It disappears

What is the role of chemical bonds in chemical energy?

• They create energy

• They store energy

• They destroy energy

• They convert energy