Which of the following are examples of endothermic processes?
I. A cold pack
II. The evaporation of alcohol
III. The burning of gasoline
IV. The combustion of methanol

Question

Which of the following are examples of endothermic processes?
I. A cold pack
II. The evaporation of alcohol
III. The burning of gasoline
 IV.   The combustion of methanol

Quizplus · Accepted Answer

I and II are endothermic processes because they absorb heat from their surroundings. A cold pack absorbs heat to cause a chemical reaction, and the evaporation of alcohol requires heat absorption to change from liquid to gas. The burning of gasoline and the combustion of methanol are exothermic, releasing heat.

Which of the Following Are Examples of Endothermic Processes