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Heat energy changes in chemical reactions

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Question 42

The reaction profile below shows the energy changes during the reaction between hydrogen and chlorine to produce hydrogen chloride:

H2(g)+Cl2(g)→2HCl(g) H_2(g) + Cl_2(g) \rightarrow 2HCl(g) H2​(g)+Cl2​(g)→2HCl(g)

A reaction profile diagram. The vertical y-axis is labelled 'Energy' and the horizontal x-axis is labelled 'Progress of reaction'. The reactants, H2 and Cl2, are represented by a horizontal line of higher energy than the horizontal line representing the products, 2HCl. A curved line starts at the reactant level, rises to a peak representing the transition state, and then drops down to the lower products level.

Describe what this reaction profile shows about the energy involved in bond breaking and bond making in this reaction.

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Heat energy changes in chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /Heat energy changes in chemical reactions

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