Question

Which of the following phase changes is an endothermic change?

Answer 1

Answer: The correct answer is B) Vaporization.

A process is called endothermic when it absorbs energy from surrounding. In other words, if energy is consumed in any process then it is termed endothermic change. When any process releases energy in the surrounding then it is called exothermic process.

In vaporization, energy is absorbed by water molecules, which form vapors. Thus, it is an endothermic change.

On the contrary, in condensation, deposition, and freezing, the new bonds are being formed and thus energy is released in the surrounding. Therefore, they are exothermic process.

Answer 2

I think the correct answer from the choices listed above is option B. The phase change that is an endothermic change would be vaporization. This includes melting and sublimation. Hope this answers the question. Have a nice day.