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Heat energy changes in chemical reactions

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Question 30

Hydrogen reacts with fluorine gas to produce hydrogen fluoride.

H2(g)+F2(g)→2HF(g) \text{H}_2(\text{g}) + \text{F}_2(\text{g}) \rightarrow 2\text{HF}(\text{g}) H2​(g)+F2​(g)→2HF(g)

This reaction is highly exothermic.

Complete the reaction profile diagram below for this reaction. On your diagram, you should:

  • Draw the curve showing the energy path from reactants to products.
  • Label the products.
  • Draw and label an arrow to show the activation energy (EaE_aEa​).
  • Draw and label an arrow to show the overall energy change (ΔH\Delta HΔH).

An incomplete reaction profile template. The vertical axis is labeled 'Energy' and the horizontal axis is labeled 'Progress of reaction'. A horizontal line representing the reactants, H₂ + F₂, is pre-drawn on the left side of the grid.

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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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