Which process is liquid turning into gas?

Which process is liquid turning into gas?

• A. Boiling
• B. Freezing
• C. Condensation
• D. Deposition

Answer: (A)

The main idea here is a phase change driven by energy input: turning a liquid into a gas requires enough energy to overcome the liquid’s cohesive forces. When a liquid is heated to its boiling point, energy causes molecules to form vapor within the liquid, creating bubbles that rise and release as gas. This process is called boiling. The other options don’t describe liquid to gas: freezing is liquid to solid, condensation is gas to liquid, and deposition is gas to solid. Evaporation also turns liquid to gas, but it happens at the surface at any temperature below the boiling point, whereas boiling is the characteristic bulk liquid transition at the boiling point.

The main idea here is a phase change driven by energy input: turning a liquid into a gas requires enough energy to overcome the liquid’s cohesive forces. When a liquid is heated to its boiling point, energy causes molecules to form vapor within the liquid, creating bubbles that rise and release as gas. This process is called boiling.

The other options don’t describe liquid to gas: freezing is liquid to solid, condensation is gas to liquid, and deposition is gas to solid. Evaporation also turns liquid to gas, but it happens at the surface at any temperature below the boiling point, whereas boiling is the characteristic bulk liquid transition at the boiling point.