Question

A student completes a problem solving for the energy change that occurs when steam condenses on a glass to form condensation as being overall exothermic. How would you score this student's work?(1 point) Responses The student is incorrect because condensation results when water particles speed up so it is endothermic. The student is incorrect because condensation results when water particles speed up so it is endothermic. The student is correct because as water molecules in steam slow down to form water droplets, they release energy to the surroundings as heat, so it is exothermic. The student is correct because as water molecules in steam slow down to form water droplets, they release energy to the surroundings as heat, so it is exothermic. The student is correct because when water molecules in steam form water droplets they absorb energy from their surroundings making the reaction endothermic. The student is correct because when water molecules in steam form water droplets they absorb energy from their surroundings making the reaction endothermic. This student is incorrect because condensation results from particles slowing down so the phase change is endothermic.

Answer 1

The appropriate response to score the student's work would be: "The student is correct because as water molecules in steam slow down to form water droplets, they release energy to the surroundings as heat, so it is exothermic."

This correctly describes the process of condensation, where steam (gas) turns into liquid water. During this phase change, the molecules lose kinetic energy and release energy to the surroundings, making the process exothermic. The other responses incorrectly explain the process or describe it as endothermic, which is not accurate. Therefore, the student should receive full credit for their correct understanding of the energy changes involved in condensation.