, 2
1
(a) Table 1.1 shows the diameters of some particles.
Table 1.1
Particle Diameter (m)
Carbon atom 1.54 × 10–10
Fullerene molecule 1.10 × 10–9
Silver atom 2.88 × 10–10
Platinum nanoparticle 1.00 × 10–8
(i) Which two particles have diameters with the same order of magnitude?
....................................................................... and ....................................................................... [1]
(ii) Write down the particles in order of diameter.
Smallest ........................................
........................................
........................................
Largest ........................................
[2]
(b) Nanoparticles make effective catalysts because they have a high surface area to volume ratio.
Table 1.2 shows the surface area to volume ratio of some different sized particles.
Table 1.2
Particle of Particle of
Nanoparticle
Fine Powder Coarse Powder
Size of Particle (nm) 60 600 6000
Surface Area to
0.1 0.01 0.001
Volume Ratio
Describe the relationship between the size of a particle and its surface area to volume ratio.
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller yestudyone. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $16.49. You're not tied to anything after your purchase.
