Endothermic Energy
Endothermic energy refers to the energy absorbed by a system during a chemical or physical process
This type of reaction or change requires an input of heat or energy
The endothermic process absorbs energy from its surroundings in the form of heat, leading to a decrease in temperature in the surrounding environment.
Example
Melting Ice: Absorbs heat to convert solid → liquid.
Boiling Water: Absorbs heat to convert liquid → gas.
Exothermic Energy
An exothermic reaction is a chemical or physical process that releases energy, usually in the form of heat or light, to the surroundings
A chemical reaction in which energy is released from the system to the surroundings is called an exothermic reaction.
Exothermic Energy Example
Condensation -: Gas → Liquid releases heat
Freezing -: Liquid → Solid releases heat to surroundings
Exothermic: Feels warm/hot, gives off heat or light
Endothermic: Feels cold, absorbs heat
Endothermic feels cold: Takes heat from surroundings
Exothermic feels hot: Releases heat to surroundings
Exothermic examples: Burning, hand warmers, fireworks
Endothermic examples: Photosynthesis, ice packs, boiling, melting
Cooking is endothermic: Absorbs heat to cook or change form
How can you tell if a chemical reaction is exothermic or endothermic just by observing it?
Why do endothermic reactions feel cold to the touch, while exothermic reactions feel warm or hot?
What are some common real-life examples of exothermic reactions (e.g., combustion, hand warmers)?
Can you name some endothermic processes you encounter in everyday life (e.g., photosynthesis, ice packs)?
Why is cooking (e.g., boiling water or baking bread) considered an endothermic process?