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Starter activity. What’s the most pleasant smell you can think of? And the most revolting?. Making and testing perfumes…. Chanel No.5 Advert. Perfume facts. Dogs can detect the difference in smell between non-identical twins but not between identical twins.

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Starter activity

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  1. Starter activity What’s the most pleasant smell you can think of? And the most revolting?

  2. Making and testing perfumes… Chanel No.5 Advert

  3. Perfume facts • Dogs can detect the difference in smell between non-identical twins but not between identical twins. • Your sense of smell is nowhere near as good as an average moth’s. Some male moths can detect a female’s scent up to 11 km away. • One of the key scents in many male aftershaves is musk, which was originally extracted from glands on the male musk deer. • In May 1921, when the perfume creator Ernest Beaux presented her with a choice of fragrances, Gabrielle Chanel barely hesitated before choosing the fifth one, which was to become CHANEL N°5.

  4. What’s in a perfume? 10 August 2014 MUST know the properties a perfume needs SHOULD explain how we smell COULD Explain volatility using the kinetic theory

  5. Why does a perfume need these properties? • Volatile (evaporates easily) • Non-toxic • Does not dissolve in water • Does not irritate the skin

  6. Diffusion animation 1

  7. Diffusion The “scent particles” from this hamburger are in high concentration here: Eventually they will “diffuse” out into this area of low concentration: Diffusion is when something travels from an area of high concentration to an area of low concentration. For example, consider the scent from a hamburger…

  8. How do we smell? (sGa) particles (sueffid) up our (eson). We have (sorsenss) in our noses. A signal is then sent to our (niabr).

  9. Volatility • A liquid is said to be volatile if it evaporates easily. • Why might this be the case? • Which is most volatile, petrol or water?

  10. Making an ester • Alcohol + carboxylic acid ester + water • Butanol + ethanoic acid butylethanoate + water

  11. Keywords

  12. Keywords

  13. Can you now… • State four properties that are useful in a perfume? • Explain why these properties are useful? • Explain volatility using the kinetic theory?

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