Investigate if heat is lost through convection quicker then evaporation.

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Paula Wilkes 10JW

Plan

Aim

Investigate if heat is lost through convection quicker then evaporation.

Apparatus:

Beakers, water (150ml), Thermometer,

stand and clamp, red material, scissors and timer.

Key factors

I need to keep the size of the beaker, water (150ml), temperature and insulating material. I need to

Change where I put the insulating material on the beaker. I need to measure the water (150ml).

To make this experiment a fair test I will have to keep the following factors the same:

  • Volume of water
  • Starting temperature of water
  • The number of times the insulation is wrapped around the container
  • Material of container
  • Where the thermometer is placed in the water
  • Be careful to protect eyes by using safety goggles

 

If I keep all of these the same my experiment will be a fair one.

Method

 

  1. Put on safety goggles
  2. Collect all the equipment that is needed as shown in apparatus list above
  3.  Wrap the two containers with the chosen insulators.
  4.  Boil kettle
  5.  Pour 150ml of boiled water into measuring cylinder
  6.  Pour this into one of the two containers
  7.  Put the thermometer in the water
  8.  Wait until the water cools down to 65°c
  9.  Start stop clock
  10.  Record the temperature every minute for 20 minutes
  11.  Repeat procedure for the other container
  12.  Repeat the whole set of experiment twice to ensure greater accuracy
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Safety

Safety precautions are needed because I am dealing with hot water, which can scald. The following things need to be thought about, in order to keep this experiment safe:

 

  • Be careful not to knock over the container with the hot water in
  • Be careful not to knock over other peoples containers
  • Care is needed when pouring hot water
  • Do not run with the container of hot water

Diagra

 

Prediction

I predict that the most heat lost is in convection and evaporation.

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