Answer the following question:
Write the difference between exothermic and endothermic reaction.
Answer variants:
A chemical reaction in which heat energy is released to the surroundings
Energy is taken in by the reaction and the surroundings become cooler
A chemical reaction in which heat energy is absorbed from the surroundings
Photosynthesis
Often produces heat or light without external supply
Combustion of fuels
i. Exothermic reaction
Definition:
Properties:
Example:
ii. Endothermic reaction
Definition:
Properties:
Example: