What does one mean by endothermic reaction? Give example.

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Endothermic reactions are chemical reactions in which heat energy is absorbed. The most common type of endothermic reaction is the process of photosynthesis, in which plants use sunlight to transform carbon dioxide into sugars and oxygen. This type of reaction usually feels cold. The heat absorbed by the reaction provides a lot of energy needed for the reaction to occur. The chemical bonds that are broken need more energy than is released reforming them to make new products.

Examples of Endothermic Reaction

  • Frying Eggs
  • Baking Bread
  • Evaporation of Water
  • Melting ice cubes
  • Converting frost to water vapor
  • Forming a cation from an atom in the gas phase
  • Splitting a gas molecule
  • Separating ion pairs
  • Sublimation of dry ice into carbon dioxide gas

What happens when dilute hydrochloric acid is added to iron fillings

Photosynthesis

Photosynthesis is the process of converting light energy into chemical energy that can be used by plants for growth and reproduction. Photosynthesis is one of the key processes that sustains life on Earth, because most organisms rely on plants, animals, and other organisms as their food source.

The photosynthesis equation is as follows:

6CO2 + 6H20 + (energy) → C6H12O6 + 6O2

Carbon dioxide + water + energy from light produces glucose and oxygen

The process takes place in chloroplasts within plant cells. Chloroplasts are the organelles that contain the pigments used in photosynthesis and they also contain the enzymes necessary for this process. These pigments absorb energy from sunlight and carry out the reactions of photosynthesis.

What is a balanced chemical equation? Why should a chemical equation be balanced?

Evaporation of Water

Evaporation of water is the process by which liquid water changes into gaseous water through the absorption of heat from a gaseous material, such as air or an object. This process is an endothermic reaction that requires energy. It occurs when moisture in an air parcel comes into contact with a surface and the vapor pressure of the liquid is higher than its partial pressure on the surface.

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