Which of the following phase changes is an endothermic change?
A. condensation
B. vaporization
C. deposition
D. freezing
whats the answer
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To determine which of the following phase changes is an endothermic change, we need to understand what endothermic and exothermic mean in the context of phase changes.
An endothermic process or change absorbs energy from its surroundings, typically in the form of heat, while an exothermic process or change releases energy.
Now, let's examine each of the given options:
A. Condensation: Condensation is the phase change from gas to liquid. It occurs when a gas loses heat energy and converts into a liquid. This change is exothermic because it releases energy.
B. Vaporization: Vaporization, also known as evaporation, is the phase change from liquid to gas. It occurs when a liquid gains heat energy and converts into a gas. This change is endothermic because it absorbs energy.
C. Deposition: Deposition is the phase change from gas directly to solid without passing through the liquid phase. It occurs when a gas loses heat energy and converts into a solid. This change is exothermic because it releases energy.
D. Freezing: Freezing is the phase change from liquid to solid. It occurs when a liquid loses heat energy and converts into a solid. This change is exothermic because it releases energy.
Therefore, out of the given options, the phase change that is an endothermic change is B. vaporization.