GED Science TestPhysical ScienceMedium
A scientist is observing a chemical reaction that releases heat into its surroundings, causing the temperature of the reaction vessel to rise. What type of reaction is this?
- APrecipitation
- BRedox
- CExothermic
- DEndothermic
Show answer & explanationAnswer & explanation
Correct answer: C. Exothermic
Exothermic reactions are chemical reactions that release energy, typically in the form of heat, into their surroundings, leading to a temperature increase.
Why the other options are wrong
- A. Precipitation reactions form an insoluble solid product from soluble reactants.
- B. Redox reactions involve the transfer of electrons between reactants.
- D. Endothermic reactions absorb heat from the surroundings, causing a temperature decrease.
Exothermic Reaction
A chemical reaction that releases energy, usually in the form of heat or light, into the surroundings.
- Temperature of surroundings increases.
- Energy is a product of the reaction.
- Examples include combustion and neutralization.
Memory trick: Energy goes 'out' or 'in' a reaction.