Question

List five exothermic and endothermic reaction in kitchen?

Answer 1

Endothermic reactions: Heat is absorbed.

1) Photosynthesis: Plants absorb heat energy from sunlight to convert carbon dioxide and water into glucose and oxygen.

6CO2 + 6 H2O + heat ---> C6H12O6 + 6O2

2) Cooking an egg: Heat energy is absorbed from the pan to cook the egg.

Exothermic reactions: Heat is released.

1) Combustion: The burning of carbon-containing compounds uses oxygen, from air, and produces carbon dioxide, water, and lots of heat. For example, combustion of methane (\text{CH}_4CH

4

​ C, H, start subscript, 4, end subscript) can be represented as follows:

CH4 + 2(O2) ---> CO2 + 2H2O + heat

2) Rain: Condensation of water vapor into rain releasing energy in the form of heat is an example of an exothermic process.