Which type of energy change occurs during the burning of magnesium ribbon?

• A. Endothermic; energy is absorbed from the surroundings
• B. Energy is only absorbed as light
• C. No energy change occurs
• D. Exothermic; energy is released as heat and light

Answer: (D)

Verified step by step guidance

1. Understand the process: Burning magnesium ribbon is a chemical reaction where magnesium reacts with oxygen to form magnesium oxide.
2. Recall the definition of exothermic and endothermic reactions: Exothermic reactions release energy to the surroundings, usually as heat and/or light, while endothermic reactions absorb energy from the surroundings.
3. Consider the observable evidence: When magnesium burns, it produces a bright white flame, indicating the release of energy in the form of light and heat.
4. Apply the concept: Since energy is released during the burning of magnesium, this reaction is exothermic.
5. Conclude that the energy change during the burning of magnesium ribbon is exothermic, with energy released as heat and light.