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Combustion of alcohols - In this coursework I shall be calculating the amount of change in enthalpy used by an alcohol to heat water by 15oC.

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Introduction

Combustion of Alcohols - Chemistry Coursework Planning In this coursework I shall be calculating the amount of change in enthalpy used by an alcohol to heat water by 15oC. To complete this coursework I shall use the following equipment: safety glasses, a calorimeter to hold the water, various sprit burners using a different alcohol in each, a thermometer to measure the change in temperature, a clamp to hold the calorimeter, and a system to which will reduce the amount of heat lost in this experiment. The amount of water that will be used will be 100cm3. The change in temperature will be 15oC. I shall also use the minimum of three different alcohols. The reason for using three different alcohols is that I can see the difference of the alcohols by the difference in enthalpy changes. ...read more.

Middle

I shall place the lid back on to the burner to prevent evaporation. The highest temperature reached will be noted. I shall measure the mass of the burner (again with the lid on) and record the mass. I shall then perform this experiment again with another three different alcohols and fresh water. The four different alcohols I have chosen to use are: Methanol, Ethanol, Propan-1-ol, and Butan-1-ol. I have chosen those four alcohols due to them all being straight chains and their molecular make-up are almost identical except for the amount of CH2s involved. There are many hazards in this experiment. The hazard that is most prominent would be fire. The danger of fire is that it will set alight many objects, and will burn people and cause intense pain to the victim. ...read more.

Conclusion

If it is split in the lab all sources of ignition must be shut off, all windows must be opened, mineral absorbent must be applied to the spill and scooped up into a bucket and water must be added. Propan-1-ol and butan-1-ol are very similar. They both are highly flammable. If it is inhaled it can be harmful. The vapours cause headaches, dizziness and irritate the eyes. If swallowed wash the casualty's mouth with water and seek medical attention. If inhaled the casualty must be taken to fresh air to rest and be kept warm. If splashed into the eyes the casualty's eyes must be flooded for 10 minutes with gently running cold tap water and must seek medical attention. Matthew Colin David Hancock ...read more.

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