To heat a liquid until bubbles rise constantly to the surface is to do what?

To heat a liquid until bubbles rise constantly to the surface is to do what?

• A. Boil
• B. Water vapour
• C. Melts
• D. Vacuum

Answer: (A)

Boiling is happening here. When a liquid is heated enough that bubbles form throughout the liquid and continuously rise to the surface, it’s undergoing rapid vaporization—the liquid is turning into gas. The bubbles show that vapor is being created inside the liquid, not just at the surface, and at atmospheric pressure the temperature where this starts stays essentially fixed while the liquid keeps turning into vapor. Melting would be a solid becoming a liquid, which doesn’t involve bubbling in the liquid. Water vapour is the gas that forms, but the process of heating to make it rise as bubbles is called boiling. Vacuum isn’t about heating a liquid at all.

Boiling is happening here. When a liquid is heated enough that bubbles form throughout the liquid and continuously rise to the surface, it’s undergoing rapid vaporization—the liquid is turning into gas. The bubbles show that vapor is being created inside the liquid, not just at the surface, and at atmospheric pressure the temperature where this starts stays essentially fixed while the liquid keeps turning into vapor. Melting would be a solid becoming a liquid, which doesn’t involve bubbling in the liquid. Water vapour is the gas that forms, but the process of heating to make it rise as bubbles is called boiling. Vacuum isn’t about heating a liquid at all.