chemical recations

Cards (9)

  • Types of chemical reactions
    • Exothermic reactions (release energy to surroundings)
    • Endothermic reactions (absorb energy from surroundings)
    • Neutralisation reactions (between acids and bases or acids and alkalis)
    • Thermal decomposition reactions (use thermal energy to break one substance down into others)
  • Conditions that can alter the rate of chemical reactions
    • Catalysts
    • Surface area
    • Temperature
    • Concentration
    • Size of reaction vessel
  • How reactions rely on particles colliding
    1. Particles colliding in correct alignment (orientation)
    2. Particles colliding with enough energy (activation energy)
    3. More frequent collisions between particles = faster reaction
  • Increasing concentration

    Increases number of particles in reacting substances, more likely to collide and react, increasing rate of reaction
  • Increasing surface area

    Increases rate of reaction because reactions only happen at the surface, where particles can come into contact
  • Increasing temperature

    Increases rate of reaction because particles have more kinetic energy, move around faster, collide more frequently
  • Decreasing size of reaction vessel

    Particles in reaction will be closer together, collide and react more frequently
  • Catalyst

    Substance that increases the rate of reaction without being used up in the reaction
  • whats a catalyst

    substance that increases the rate of reaction without being used up in the process