Which of the following processes is endothermic?

Question

Quizplus · Accepted Answer

An endothermic process is a process that requires or absorbs heat from its surroundings. An atom absorbs a photon means it gains energy, and hence, heat. Therefore, option C is the correct answer. Option A is incorrect because emitting a photon denotes losing energy, which releases heat into the surroundings. Option B is incorrect because condensation releases heat and is, therefore, exothermic. Option D is incorrect: The electron affinity process is exothermic in fluorine because when an extra electron is added, it becomes negative and shortens its range, leading to a release of heat. Finally, option E is incorrect because at least one of the above processes is endothermic, as already explained for option C, and hence, cannot be the correct answer.

Which of the Following Processes Is Endothermic