720704
Descrição
Mapa Mental por livmills97, atualizado more than 1 year ago
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Criado por livmills97
aproximadamente 10 anos atrás
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Ethanol
- Ethanol is toxic.
- 15% = Kills the yeast cells that made it, stopping fermentation.
- Stronger drink = Heat fermentation mixture.
- Ethanol boils at a lower temperature than water, so the fraction of
the liquid that boils first will contain a higher percentage of ethanol.
- This vapour is condensed to produce stronger drinks.
- This process is called fractional distillation.
- This process is called fractional distillation.
- This vapour is condensed to produce stronger drinks.
- Pure ethanol will boil at 78 degrees celsius.
- Ethanol can be made by reacting ethene with steam in the
presence of a catalyst. This is called hydration = Ethene and water.
- ethene + steam + catalyst = ethanol
- C2H4 (G) + H2O (G) = C2H5OH (L)
- C2H4 (G) + H2O (G) = C2H5OH (L)
- Ethene is produced from crude oil.
- A small amount of ethene occurs naturally in the
petroleum gases that are found with the oil.
- Large amounts of ethene are made by cracking larger
molecules in the higher-boiling fractions of crude oil.
- Fuels made from plant crops are called biofuels.
- Fermentation = 15% concentration
- Fractional distillation = 95% pure
- Heating ethanol to a high temperature in the presence of a
suitable catalyst produces ethene and steam (dehydration).
- ethanol + catalyst = ethene and steam
- C2H5OH (G) =
C2H4 (G) + H2O (G)
- C2H5OH (G) =
C2H4 (G) + H2O (G)
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