College of Massage Therapists of British Columbia (CMTBC) Practice Exam

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What do you call the process of converting liquid to gas?

  1. Condensation

  2. Evaporation

  3. Combustion

  4. Fusion

The correct answer is: Evaporation

The process of converting liquid to gas is known as evaporation. This occurs when molecules in a liquid gain sufficient energy to overcome intermolecular forces, allowing them to enter the gaseous phase. Evaporation is a common phenomenon that happens at any temperature, as long as the liquid's vapour pressure is lower than that of the atmosphere. For context, condensation refers to the process where gas transitions back into a liquid, which is the opposite of evaporation. Combustion is a chemical reaction that typically involves the burning of a substance in the presence of oxygen, producing heat and light, while fusion refers to the process of melting, where a solid turns into a liquid. Each of these processes is distinct and plays a role in different physical and chemical changes.