What is activation energy?All reactions need a certain amount of energy to get started.This is called the activation energ...
What is activation energy?All reactions need a certain amount of energy to get started.This is called the activation energ...
What is activation energy?All reactions need a certain amount of energy to get started.This is called the activation energ...
What is activation energy?All reactions need a certain amount of energy to get started.This is called the activation energ...
What is activation energy?All reactions need a certain amount of energy to get started.This is called the activation energ...
Do different reactions need different Ea?In some reactions, the bonds are easily broken and a lowactivation energy is need...
Do different reactions need different Ea?In some reactions, the bonds are easily broken and a lowactivation energy is need...
Do different reactions need different Ea?In some reactions, the bonds are easily broken and a lowactivation energy is need...
Do different reactions need different Ea?In some reactions, the bonds are easily broken and a lowactivation energy is need...
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IGCSE 11.1.13

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IGCSE 11.1.13

  1. 1. What is activation energy?All reactions need a certain amount of energy to get started.This is called the activation energy (Ea). 1 of 35 © Boardworks Ltd 2007
  2. 2. What is activation energy?All reactions need a certain amount of energy to get started.This is called the activation energy (Ea).Activation energy is needed to start breaking the bonds ofthe reactants. In most chemical reactions, some existingbonds need to be broken (an endothermic process) beforenew bonds can be made (an exothermic process). 2 of 35 © Boardworks Ltd 2007
  3. 3. What is activation energy?All reactions need a certain amount of energy to get started.This is called the activation energy (Ea).Activation energy is needed to start breaking the bonds ofthe reactants. In most chemical reactions, some existingbonds need to be broken (an endothermic process) beforenew bonds can be made (an exothermic process). 3 of 35 © Boardworks Ltd 2007
  4. 4. What is activation energy?All reactions need a certain amount of energy to get started.This is called the activation energy (Ea).Activation energy is needed to start breaking the bonds ofthe reactants. In most chemical reactions, some existingbonds need to be broken (an endothermic process) beforenew bonds can be made (an exothermic process). Ea 4 of 35 © Boardworks Ltd 2007
  5. 5. What is activation energy?All reactions need a certain amount of energy to get started.This is called the activation energy (Ea).Activation energy is needed to start breaking the bonds ofthe reactants. In most chemical reactions, some existingbonds need to be broken (an endothermic process) beforenew bonds can be made (an exothermic process). Ea 5 of 35 © Boardworks Ltd 2007
  6. 6. Do different reactions need different Ea?In some reactions, the bonds are easily broken and a lowactivation energy is needed; for example, the reactionbetween sodium hydroxide and water starts at roomtemperature. 6 of 35 © Boardworks Ltd 2007
  7. 7. Do different reactions need different Ea?In some reactions, the bonds are easily broken and a lowactivation energy is needed; for example, the reactionbetween sodium hydroxide and water starts at roomtemperature. In other reactions, the bonds are strong and not easily broken. The reaction needs lots of activation energy. 7 of 35 © Boardworks Ltd 2007
  8. 8. Do different reactions need different Ea?In some reactions, the bonds are easily broken and a lowactivation energy is needed; for example, the reactionbetween sodium hydroxide and water starts at roomtemperature. In other reactions, the bonds are strong and not easily broken. The reaction needs lots of activation energy. An example is the combustion of charcoal (carbon) – it needs lots of heating before it will start to burn. 8 of 35 © Boardworks Ltd 2007
  9. 9. Do different reactions need different Ea?In some reactions, the bonds are easily broken and a lowactivation energy is needed; for example, the reactionbetween sodium hydroxide and water starts at roomtemperature. In other reactions, the bonds are strong and not easily broken. The reaction needs lots of activation energy. An example is the combustion of charcoal (carbon) – it needs lots of heating before it will start to burn. 9 of 35 © Boardworks Ltd 2007

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