Question

What is endothermic reaction?​

Answer 1

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What is endothermic reaction?

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An endothermic process is any process with an increase in the enthalpy H (or internal energy U) of the system.

[1] A closed system usually absorbs thermal energy from its surroundings, which is heat transfer into the system.

It may be a chemical process, such as dissolving ammonium nitrate in water, or a physical process .

Example - The melting of ice cubes.

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• Photosynthesis
• Melting
• Evaporation
• Sublimation
• Cracking of alkanes
• Thermal decomposition (oxidation)
• Hydrolysis
• Nucleosynthesis of elements heavier than nickel in stellar cores .

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Answer 2

Answer:

An endothermic reaction is a chemical reaction in which the reactants absorb energy from surroundings to form products.

Example: Photosynthesis