When a block of ice melts, which type of energy change is primarily occurring?

• A. Release of heat (exothermic process)
• B. Transformation of chemical energy to electrical energy
• C. Absorption of heat (endothermic process)
• D. Conversion of kinetic energy to potential energy

Answer: (C)

Verified step by step guidance

1. Understand the process: When ice melts, it changes from solid to liquid, which is a phase change requiring energy input.
2. Recall that melting is an endothermic process, meaning it absorbs heat from the surroundings rather than releasing it.
3. Identify the type of energy involved: The energy absorbed is heat energy, which breaks the hydrogen bonds holding the ice molecules in a solid structure.
4. Recognize that this energy change is not related to chemical energy transformation or conversion between kinetic and potential energy, but specifically the absorption of heat.
5. Conclude that the primary energy change during melting of ice is the absorption of heat, making it an endothermic process.