Which Fuel Releases the Most Energy Per Mole Measure by Heating Water

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Which Fuel Releases the Most Energy Per Mole Measure by Heating Water

Hypothesis

In this investigation I will burn alcohols to heat up a beaker of

water. I will be burning five fuels which are called Methanol,

Ethanol, Propanol, Butanol and Pentanol. In my investigation I predict

that the alcohol Pentanol would release more energy than the other

alcohols because as the chain length of the alkanes get longer, the

more energy is released.

Apparatus

· Retort stand

· Clamp

· Measuring cylinder

· Thermometer

· Heatproof mats

· Copper can

· Splint

· Chemicals(Methanol, Ethanol, Propanol, Butanol and Pentanol)

Independent variables

· Using the same scales

· Same amount of water in copper beaker

· Same height of thermometer from water

· Temperature of water before experiment

· Weight of alcohol before experiment

Fair Test

To make it a fair test:

· I made sure I put the same amount of water in the copper can.

· I made sure that the water started with the same temperature with

the same alcohol.

· I made sure that the height was the same from the water to the

thermometer.

Health and Safety

· Wear goggles

· Hide tie in the shirt

· Keep bags under the table

Method

I first got all the apparatus that I needed and set it up. I got a

measuring cylinder and measured a 100 cm³ of water and poured it in a

copper can. Then I connected the copper can to the stand with a clamp.

Then I would get a spirit lamp which is filled with alcohol and

measure it. Then I would use a spirit to light it and put it under the

copper can. Then I would heat and stir the water until the temperature

has gone up another 10 degrees Celsius. I will then blow out the flame

and put the cap on the burner quickly and reweigh the alcohol.

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