Nanoparticles (T)

• What are the three types of particles discussed in the video?

  Coarse particles, fine particles, and nanoparticles
• Why are nanoparticles considered to have a high surface area to volume ratio?

  Because they have a much larger surface area compared to their volume
• What are the advantages of using nanoparticles?

  • High surface area to volume ratio
  • Requires smaller quantities for effectiveness
  • Useful in various applications like medicine, cosmetics, and electronics
• What are the disadvantages or risks associated with nanoparticles?

  • Potential absorption into the body
  • Unknown long-term effects
  • Need for careful study and usage
• What is the size range of coarse particles?

  $1 \times 10^{-5} \text{ m to } 2.5 \times 10^{-6} \text{ m}$
• What is the size range of fine particles?

  $1 \times 10^{-7} \text{ m to } 2.5 \times 10^{-6} \text{ m}$
• What is the size range of nanoparticles?

  $1 \text{ nm to } 100 \text{ nm}$
• How does the surface area to volume ratio change as particle size decreases?

  The ratio increases by 10 times for every 10 times decrease in size
• How does the surface area to volume ratio of a cube change when its side length is reduced by a factor of 10?

  • Surface area increases by a factor of 10
  • Volume decreases by a factor of 1000
  • Resulting in a higher surface area to volume ratio
• What implications does the high surface area to volume ratio of nanoparticles have for their use in catalysis?

  It makes them more effective as catalysts due to more active sites