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Explain the Terms with Examples. Endothermic Reaction - Science and Technology 1

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Answer in Brief

Explain the terms with examples.

Endothermic reaction

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Endothermic reaction:

An endothermic reaction is any chemical reaction that absorbs heat from its environment. The absorbed energy provides the activation energy for the reaction to occur. A hallmark of this type of reaction is that it feels cold.

A good example of an endothermic reaction includes dissolving a salt. It doesn't have to be table salt, nor does the solvent need to be water.

  • The reaction of barium hydroxide octahydrate crystals with dry ammonium chloride
  • Dissolving ammonium chloride in water
  • The reaction of thionyl chloride (SOCl2) with cobalt(II) sulfate heptahydrate
  • Mixing water and ammonium nitrate
  • Mixing water with potassium chloride
  • Reacting ethanoic acid with sodium carbonate
  • Photosynthesis (chlorophyll is used to react carbon dioxide  plus water plus energy to make glucose and oxygen)
Concept: Energy Change in Chemical Reactions : Exothermic and Endothermic Chemical Changes
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Balbharati Science and Technology Part 1 10th Standard SSC Maharashtra State Board
Chapter 3 Chemical reactions and equations
Q 3.1 | Page 45
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