3. Alkanols


You will need to recall the basic information from the Preliminary Course.

 Electronegativity: is the ability of an atom to attract electrons; the more electro-negative an atom, the stronger it will hold onto electrons in a chemical bond.

 Polar covalent bond: is a covalent bond where one of the atoms in it is more electronegative than the other, and so the bond has a slight (δ) charge.

 The order of electronegativity, from most electronegative to least, for relevant atoms is: fluorine, oxygen, chlorine, nitrogen, carbon and thenhydrogen.

 For example, a bond between oxygen and hydrogen is a polar bond because oxygen holds onto negative electrons stronger; thus, in this bond, oxygen is slightly negative.

Solubility Rules: 

§  Polar substances dissolve other polar substances: This is because the slightly negative end is attracted to the slightly positive end of another polar bond, forming a slight intermolecular bond.

§  Non-polar substances dissolve other non-polar substances: This is due to very weak dispersion forces between molecules.


L09: Alkanols

Vid 1:Naming Alkanols

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Vid 2: Ethanol as a solvent

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Activity: Naming alkanols
FHI: Solubility of alkanols - In the discussion focus on the impacts of the solubility of ethanol.


L10: Dehydration of Ethanol and Hydration of Ethylene

Vid 1: dehydration of Ethanol to Ethylene


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Vid 2 Hydration of Ethylene to Ethanol

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FHI: Modelling dehydration and hydration


L11: Fermentation of glucose

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FHI: Fermenting glucose

How to setup the Fermentation experiment:

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L12: Ethanol as a fuel

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If you have any questions:

L12: Ethanol as a fuel



Activity: SHI Ethanol as a Fuel Essay (see sheet below)


L13: Molar heat of combustion of ethanol

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How to set up tomorrow's experiment

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FHI: Effect of alkanol chain length on the molar heat of combustion


L14: Calculating the molar heat of combustion

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L15: Reliability in Bomb Calorimetry

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L16: Sources of Error in the Molar Heat of Combustion Experiments

Don't do on the 11\11

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