Which of the following processes is an endothermic process?

• A. Neutralization of hydrochloric acid with sodium hydroxide
• B. Condensation of water vapor
• C. Melting of ice
• D. Combustion of methane

Answer: (C)

Verified step by step guidance

1. Understand the definition of an endothermic process: it is a process that absorbs heat from the surroundings, meaning heat energy is taken in during the change.
2. Analyze each given process in terms of heat flow: Neutralization of hydrochloric acid with sodium hydroxide is typically exothermic because it releases heat when an acid and base react.
3. Condensation of water vapor is an exothermic process because it releases heat as water vapor changes to liquid water.
4. Melting of ice is an endothermic process because it requires heat absorption to change solid ice into liquid water.
5. Combustion of methane is an exothermic reaction as it releases heat energy when methane burns.