Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What is a reversible reaction?
   • A reversible reaction is one where the products of the reaction can react to produce the original reactants.
2. How can reversible reactions be represented?
   • Reversible reactions can be represented by: A B (reversible arrow) C D
3. If the reversible reaction below was heated which direction would it react? Ammonium chloride (reversible arrow) ammonia hydrogen chloride
   • If the reversible reaction of ammonium chloride was heated it would decompose to produce ammonia and hydrogen chloride.
4. If a reversible reaction is exothermic in one direction, what is it in the opposite direction?
   • If a reversible reaction is exothermic in one direction, it is endothermic in the opposite direction.
5. If 3500 KJ of energy is transferred in the forward reaction, how much energy would be transferred in the reverse reaction?
   • In a reversible reaction the same amount of Energy is transferred in each case so 3500 KJ would be transferred in the reverse reaction.
6. How can the direction of reversible reactions be changed?
   • The direction of reversible reactions can be changed by changing the conditions such as temperature and pressure of gases.