GED Science TestPhysical ScienceEasy
A chemist is performing an experiment where they combine two solutions, and the resulting mixture feels noticeably colder to the touch. What term best describes this type of reaction?
- ACombustion
- BPrecipitation
- CExothermic
- DEndothermic
Show answer & explanationAnswer & explanation
Correct answer: D. Endothermic
A reaction that absorbs energy from its surroundings, causing the temperature of the surroundings to decrease and feel colder, is known as an endothermic reaction.
Why the other options are wrong
- A. Combustion reactions release heat, making them exothermic.
- B. Precipitation refers to the formation of a solid from a solution, not necessarily related to temperature change.
- C. Exothermic reactions release heat, making the surroundings feel warmer.
Endothermic Reaction
An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, typically in the form of heat, leading to a decrease in the temperature of the surroundings.
- Absorbs heat from the environment.
- Causes the surrounding temperature to drop.
- Requires a continuous input of energy to proceed.
Memory trick: Think 'EN-ter' for endothermic, energy enters the reaction.