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CLIP 13509

Endothermic / exothermic

Endothermic / exothermic
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Key Info
  • Endothermic / exothermic
  • Science presenter Jon Chase demonstrates an exothermic and an endothermic reaction to some teenagers and explains how temperature changes can be used to identify whether a reaction is endothermic or exothermic. The exothermic reaction is the crystallisation of sodium ethanoate and the endothermic reaction is the reaction of barium hydroxide with ammonium chloride. Jon describes an easy way to remember the difference between endothermic and exothermic reactions.
  • Subject:

    Science

       Topic:

    Chem: Chemical Reactions

  • Keywords: exothermic, endothermic, energy change, BitesizeScience
Ideas for use in class
  • Students could investigate a variety of exothermic and endothermic reactions, including the exothermic reactions between hydrochloric acid and magnesium, nitric acid and sodium hydroxide, and anhydrous copper sulfate and water. Endothermic reactions include solid citric acid and sodium hydrogencarbonate, and dissolving ammonium nitrate in water. The teacher can then demonstrate a spectacular reaction such as the thermite reaction (search online for ‘RSC 74 thermite’) or the oxidation of luminol (‘RSC 6 luminol’), and the endothermic reaction seen in the video, which is the reaction of solid barium hydroxide and solid ammonium chloride (search online for ‘RSC 44 endothermic’).
Background details
  • Clip language : English
  • Aspect ratio : 16x9

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