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Differentiate between exothermic and endothermic reactions?

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Difference between exothermic and endothermic reactions:

Exothermic reaction

  1. Heat is given out during the reaction.
  2. Heat liberated is indicated by a positive sign on the product side.
  3. An exothermic reaction is represented
    reactants → product + heat
  4. Energy of the reactant is greater than the product.

Endothermic reaction

  1. Heat is absorbed during the reaction,
  2. Heat observed is indicated by negative sign on the product side.
  3. An endothermic reaction is represented as
    reactants → product – heat
  4. Energy of the reactants is lesser than the products.

Activity and questions based on it.

Activity 1
Take sulphur powder in a China dish. Mix iron granules in it and heat

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