energy changes

• What are the subtopics covered in the video?

  Exothermic and endothermic reactions
• Where can the notes for this video be purchased?

  On the Etsy page linked in the description
• What happens in an exothermic reaction?

  Energy exits the reaction into the surroundings
• What are real-life uses of exothermic reactions?

  Hand warmers and self-heating cans
• What characterizes an endothermic reaction?

  Energy enters the reaction from the surroundings
• What is a real-life use of endothermic reactions?

  Sports injury packs that get cold
• How do bond energies relate to exothermic reactions?

  Strong bonds formed release energy
• What happens in endothermic reactions regarding bond breaking?

  Breaking bonds requires energy input
• What is a reaction profile?

  An energy graph showing energy changes
• How do reactants' energy levels compare in exothermic reactions?

  Reactants have high energy at the start
• What happens to energy levels in endothermic reactions?

  Products have higher energy than reactants
• What is activation energy?

  Energy required to initiate a reaction
• What do exothermic reactions do with energy overall?

  Exothermic reactions lose energy
• What do endothermic reactions do with energy overall?

  Endothermic reactions gain energy
• What are the key differences between exothermic and endothermic reactions?

  • Exothermic reactions:
  • Energy exits the reaction
  • Examples: combustion, neutralization
  • Real-life uses: hand warmers, self-heating cans
  • Endothermic reactions:
  • Energy enters the reaction
  • Examples: thermal decomposition
  • Real-life uses: sports injury packs
• How do bond energies affect exothermic and endothermic reactions?

  • Exothermic reactions:
  • Strong bonds formed release energy
  • Endothermic reactions:
  • Bonds broken require energy input
• What does a reaction profile illustrate for exothermic and endothermic reactions?

  • Exothermic:
  • High energy reactants, lower energy products
  • Endothermic:
  • Low energy reactants, higher energy products
  • Activation energy is required to start the reaction