Heating and Cooling Investigation

Heating and Cooling Investigation

Aim- to find out if different sized cans affect the temperature of

140ml of boiled water, when they are left alone to cool.

In this experiment, I will be using two different sized cans (one 12cm

tall holding 330ml and another 9cm tall holding 150ml). I will be

seeing if each can keeps the boiled water warm for a period of time

and testing to find out which one is the best.

Fair Test

To make this a fair test, I will have to do many things. Firstly, I

will use the same amount of water (140ml) at the same temperature, as

it will have to start at the same temperature to keep it fair and also

have the same amount of water to test on. It will also have a roughly

similar amount of particles. I will also put them in the same room

together so the room temperature will be the same. The cans are made

of the same material (aluminium) because I am testing surface area

rather than different materials. I will use a water bath to heat the

water so both cans will get the same temperature of water. This is how

I will make it a fair test.

Method

The method I will be using is; I will boil 140ml of water for each can

in a water bath at 80oC. Then put the 140 ml in each of the cans at

the same time. I will check each temperature every minute for fifteen

minutes. I will then have a set of results.

Equipment

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Prediction

I predict that the big can with the larger surface area will keep the

water the warmest. I think this because large animals' surface area to

volume ratio causes very little heat loss where as small animals ratio

is better for heat loss. It is also known that larger things such as

animals cool down slower.

Therefore this shows why I predict that the large can will keep the

water the warmest.