Cfe Higher Chemistry - Unit 2: Natures's Chemistry - Fragrances

Pregunta	Respuesta
What is an essential oil?	Hydrophobic liquids which contain mixtures of volatile aroma compounds
Uses of Essential oils	Used in perfumes, cosmetics products, cleaning products and as flavorings in foods.
How are essential oils extracted from plant material?	Through steam ditillation. Steam distillation allows the boiling point of the oils to be lowered, enabling them to be extracted.
What is the key component found in many essential oils?	isoprene
How are terpenes formed?	by the joining together of multiple isoprene units.
General formula for terpenes	(C5H8)n where "n" is the no. of isoprene units
What are the two structures isoprene units can form?	Linear - isoprene molecules join "head" to "tail" Cyclic - isoprene units join to form ring structures
What is a terpenoid?	a terpene containing oxygen
Why are terpenes important for flavour and the aroma of food?	Terpenes are an important component of essentail oils and are found in many spices and plants

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