The Time Machine

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                                                        Kasim Hassan

         Chemistry

      Coursework

                         Data Analysis

                     Kasim Hassan 11W

                              Investigation

The purpose of this investigation, is to investigate which of the three cups, Polystyrene, Plastic, and Paper emit heat he fastest.  Throughout the investigation, I will investigate these three cups I have chosen, and I will methodically analyse them.

The main aim of this experiment is to find out the rate of heat transfer. Heat transfer is the transition of thermal energy – or simply, heat from a hotter to cooler object.

Heat is generally transferred due to Radiation, Conduction, and Convection. Radiation is energy that is transmitted in rays, waves, and particles. Conduction is the flow of heat through a solid. Convection is the transfer of heat by circulation through a gas or liquid.

I predict that of the three cups, the Plastic cup will release heat the quickest. I believe this as the plastic cup has the thinnest layer, thus allowing heat energy to release at a much raster rate.  

There are, however, many factors which may affect heat loss. These are: Conduction, Convection, Radiation, Evaporation, Room temperature, Thickness of the cup, Temperature of the liquid, Amount of water, and whether the cup has a lid or not.

There are also some factors I will control. These are:

  • The duration for the length of my experiment – 30 minutes
  • The starting temperature of the water – 90 °

     

                                                 

                                Procedure

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There were many stages I had to undertake in order to complete my experiment, and make it successful.  The stages of the experiment were as follows:

  • I collected all the apparatus
  • I heated enough water for all three cups
  • I poured 100ml of water in a measuring cylinder, and marked the level of water with a pen
  • I inserted the boiling water into the cup, until it reaches the line marked with the pen
  • With the thermometer in the cup, I began the stopwatch when the temperature of the water reached 90°
  • I recorded the temperature of ...

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