Fermentation Aim: To recall the chemistry of fermentation To understand that ethanol can be used as a biofuel.

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Presentation transcript:

Fermentation Aim: To recall the chemistry of fermentation To understand that ethanol can be used as a biofuel

Alcoholic drinks

alcohol grapes

Made from grain flavoured with juniper berries

Cider made from apples

Beer made from barley

Vodka made from grain (rye or wheat)

Whiskey made from barley and malted barley or rye

Champagne made from 2 types of black grapes and a white grape.

Alcopops - vodka

Port made from grapes Sherry from grapes

Brandy: made from grape wine served warm

Tequila – Mexican - from hearts of the blue agave plants

Sake – Japanese rice wine

Rum – molasses or sugar cane

Absinthe – from herbs including artemisia absinthium

Which drink do you think contains the highest concentration of alcohol? Record in your notebook

Alcohol content Beer5% Table Wine8 – 14% Sparkling wine 8 – 12% Fortified wine (port, sherry)17 –22% Spirits: vodka, gin, whiskey, brandy37.5 – 40% tequila

Every year 1000 young adults aged under 15 are admitted to hospital each year with acute alcohol poisoning. Large amounts of alcohol drunk quickly on just ONE occasion can KILL.

Grapes and grains contain carbohydrates Starch or Sugar These ferment to give ethanol and carbon dioxide

Fermentation Lime water Yeast + glucose + water at 37 o C Glucose ethanol + carbon dioxide yeast C 6 H 12 O 6 2C 2 H 5 OH + 2CO 2 Copy into your notes

Fractional Distillation Ethanol is extracted from an ethanol/water mixture by distillation. The mixture is heated to boiling and the ethanol boils first at 78 o C. Draw the apparatus

Biofuels The ethanol produced by fermenting plant material (biomass) may be used as a fuel.

Complete the sentence ‘Today I have learnt: Discuss with the person next to you

Homework Research the effect of alcohol on the body including reaction time Display as a poster (For Friday)