Question

what is the process where a solid changes to a gas without forming a liquid?
a. evaporation is the process where a solid changes to a gas without forming a liquid
b. condensation is the process where a solid changes to a gas without forming a liquid
c. sublimation is the process where a solid changes to a gas without forming a liquid
d. deposition is the process where a solid changes to a gas without forming a liquid

Explanation:

• Option A: Evaporation is the process of a liquid turning into a gas, not a solid to gas. So A is incorrect.
• Option B: Condensation is the process of a gas turning into a liquid, not a solid to gas. So B is incorrect.
• Option C: Sublimation is defined as the process where a solid changes directly to a gas without passing through the liquid state. This matches the description in the question.
• Option D: Deposition is the process where a gas changes directly to a solid (opposite of sublimation), not a solid to gas. So D is incorrect.

Answer:

C. Sublimation is the process where a solid changes to a gas without forming a liquid