... water temperature has raised 20C, remove the source of heat by placing the cover over the top of the burner. 9.Remove the burner, place it on the balance, and record the weight of the alcohol, then calculate the weight of alcohol used. 10.Calculate the enthalpy change of alcohol. 11.Repeat the above steps by using a fresh sample of water for investigate each one of the alcohols (methanol ethanol butan-1-ol and propan-1-ol, I choose them they are all primary alcohols with straight chains, only differ by CH2 chains), and record the results. 12.Calculate and compare the enthalpy change of the alcohols under investigation. Risk assessment Extreme caution must be exercised when handling inflammable liquids such as alcohols especially when a naked flame is also being used. Precautions: -Eye protection (goggles) -Hair should be tied back -Ties must be tucked into the shirt -Loose clothing must be removed -Working area must be clean -Keep away from naked flame Why the plan is reliable This plan ...

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