Which of the following processes is endothermic?
A) water droplets condensing on a soda can on a hot summer day
B) an ice pack getting cold (due to ammonium nitrate dissolving in water inside the pack)
C) thermite reaction between iron(III) oxide and aluminum (spectacular flames are observed)
D) freezing water to make ice cubes
E) none of the above are endothermic processes

Question

Quizplus · Accepted Answer

An endothermic process is one that absorbs heat from the surroundings. Option B, the ice pack getting cold, involves the dissolution of ammonium nitrate in water, which is an endothermic process as it absorbs heat from the surroundings. The other options are not endothermic - option A involves water droplets condensing, which releases heat to the surroundings; option C involves a thermite reaction, which produces heat; and option D involves water freezing, which releases heat to the surroundings.

Which of the Following Processes Is Endothermic