The combustion of Alcohols investgation: Investigate the heat energy in a range of alcohol's used as fuels.

Combustion of Alcohols THE COMBUSTION OF ALCOHOLS PROBLEM Investigate the heat cleverness in a turn tail of inebriants used as terminates. HYPOTHESIS I predict that octanol will release the well-nigh heat zilch. This is because there is more bring together nil in that corpuscle than the other alcohols. Within a molecule there ar bond energies that are holding the atoms together. When the fuel combusts a chemic reaction takes place, this breaks the bonds, this requires zipper, and makes new bonds this gives start energy. The energy differences between the cardinal tell us how very much energy was given step forward or interpreted in. We can shew this on a graph. ENERGY CHANGES DURING A REACTION To fate the bond energies in the molecule of the alcohol we have to visualize at the how much energy is in the separate bonds of the molecule. infra we have a table of bond energies. confederation Bond Energy (kj/mol) C - OH 402 C - H 435 C - C 347 H - O 464 C = O 805 If we draw out the structure of each molecule baffling in the chemic reaction we can easily find out how much energy is in that molecule. STRUCTURE OF THE MOLECULES INVOLVED M ethyl alcohol ETHANOL PROPANOL BUTANOL PENTANOL HEXANOL HEPTANOL OCTANOL CARBON DIOXIDE WATER BALANCED EQUATIONS If we persist in the bond energies into these balanced equations, and we subtract the energy taken in by the breaking of the bonds from the energy given out by the formation of new bonds we will get the come up energy released. METHANOL 2CH3OH + 3O2(r) 2C02 + 4H20 ETHANOL 2C2H5OH + 6O2(r) 4C02 + 6H20 PROPANOL 2C3H5OH + 9O2(r) 6C02 + 8H20 BUTANOL 2C4H7OH + 12O2(r) 8C02 + 10H20 PENTANOL 2C5H9OH + 15O2(r) 10C02 + 12H20 HEXANOL 2C6H11OH + 18O2(r) 12C02 + 14H20... If you postulate to get a full essay, order it on our website: BestEssayCheap.com

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