Fair Testing
To get accurate results we needed to make this experiment a fair one. We did this by making sure that we measured the temperature at the exact times that they were supposed to be taken. I also made sure that I put the exactly the right amount of water into the cup’s.
Evaluation
As you can see from the results on the table and graph (on the next page) our prediction was correct. We have proved that when u cover the copper calorimeter with aluminium foil it will stop the radiation waves which are a factor of heat loss. So when covered with aluminium foil it will keep heat better than without the foil. The foil stops radiation thereby keeping the water temperature higher than the normal cup.
Conclusion
The results of the experiment, which are displayed in the graph and table, indicate that the aluminium covered cup obviously had a positive affect on the experiment, as the it kept the boiling water hotter then the control cup. This can be shown on the graph, by the constantly higher temperature and on the graph, by the less steep line, Showing that it keeps heat energy for the longest. This proves that Radiation is a factor of heat loss, and that aluminium foil can prevent this.
Investigation:
The Design Of A
Coffee Cup
Graph
Graph to show the temperatures of the two cups during the experiment
Key = ________ - Aluminium Calorimeter
________ - Control Calorimeter
Investigation:
The Design Of A
Coffee Cup
Evaporation
Aim
Our aim in this experiment is to find ways to prevent heat energy escaping from a cup through evaporation. We will investigate into and find ways of preventing evaporation.
Research
Evaporation is the process by which the liquid rises into the air thereby loosing heat energy. A way of stopping evaporation is to place a polystyrene piece on top of the calorimeter, this will stop heat escaping.
Apparatus
We are going to use the following pieces of apparatus:
- Polystyrene piece
- Kettle
- Stop Clock
- Thermometer
- Copper Calorimeter
- Water
- Beaker
Hypothesis
I predict that the polystyrene piece will have a large affect on the temperature of the water. I think that it will keep the liquid hotter for longer when compared with the control cup. This is due to the fact that the polystyrene piece will not allow any heat energy to escape from the drink keeping it cooler.
Investigation:
The Design Of A
Coffee Cup
Method
- Boil water in kettle, and pour into both calorimeters
- Start stop clock
- Place piece of polystyrene on top of one cup
- Measure begging temperature
- Measure temperature every minute for the next 9 minutes
- Measure finishing temperature after this
Diagram
Results table
Investigation:
The Design Of A
Coffee Cup
Graph
Graph to show the temperatures of the two cups during the experiment
Key = ________ - Polystyrene Calorimeter
________ - Control Calorimeter
Investigation:
The Design Of A
Coffee Cup
Fair Testing
To get accurate results we needed to make this experiment a fair one. We did this by making sure that we measured the temperature at the exact times that they were supposed to be taken. I also made sure that I put the exactly the right amount of water into the cup’s.
Evaluation
The results of the experiment, which are displayed in the graph and table, indicate that the polystyrene covered cup obviously had a positive affect on the experiment, as the it kept the boiling water hotter then the control cup. This is because the polystyrene slab placed on top of the cup prevents heat energy from escaping from the cup in the form of vapour, the polystyrene does not allow the vapour pass and so keeps the cup warmer. This can be shown on the graph, by the constantly higher temperature (shown in red) and can be compared to the control cup, which is the less steep line (shown in blue), showing that the polystyrene covered calorimeter keeps heat energy more efficiently. This proves that Evaporation is a factor of heat loss, and that polystyrene foil can prevent
Conclusion
As you can see from the results on the table and graph (on the previous pages) and also from our evaluation our prediction was correct. We have proved that when you cover the copper calorimeter with Polystyrene it will stop the heat energy from escaping. So when covered with a polystyrene cover it will keep heat better than without the polystyrene. The cover stops radiation thereby keeping the water temperature higher than the normal cup.
Investigation:
The Design Of A
Coffee Cup
Conduction
Aim
Our aim in this experiment is to find ways to prevent heat energy escaping from a cup through conduction. We will investigate into and find ways of preventing conduction.
Research
Conduction is where heat energy is transferred from the hot particles to the cold particles. The heat energy is transferred from vibration of the particles as they bum into each other they pass on the energy. Energy is therefore lost from the particles passing on energy from free electrons to the cup and so loose the energy. Insulators do not have these free electrons making them good insulators, and so they would be ideal to prevent conduction.
Apparatus
We are going to use the following pieces of apparatus:
- Wool
- Tin
- Kettle
- Stop Clock
- Thermometer
- Copper Calorimeter
- Water
- Beaker
Investigation:
The Design Of A
Coffee Cup
Hypothesis
I predict that the insulator of wool wrapped around the cup and held together by a tin can will be very affective. I think that it will be able to allow the cup to keep a constantly high temperature. This is because the insulator will not allow the cup to loose energy through conduction passing on energy through the particles.
Method
- Boil water in kettle, and pour into both calorimeters
- Start stop clock
- Place insulator around cup
- Measure beginning temperature
- Measure temperature every minute for the next 9 minutes
- Measure finishing temperature after this
Diagram
Investigation:
The Design Of A
Coffee Cup
Results table
Graph
Graph to show the temperatures of the two cups during the experiment
Key = ________ - Insulated Calorimeter
________ - Control Calorimeter
Investigation:
The Design Of A
Coffee Cup
Fair Testing
To get accurate results we needed to make this experiment a fair one. We did this by making sure that we measured the temperature at the exact times that they were supposed to be taken. I also made sure that I put the exactly the right amount of water into the cup’s.
Evaluation
As you can see from the results table and graph above, the insulator has a large affect on the temperature of the water when compared to the control cup. The cup prevented heat energy from escaping through conduction. If you look at the graph the temperature of the insulated cup higher and more constant than the control cup. This is shown by the red line, (representing the insulated cup), and the blue line (representing the control cup). This experiment shows that the insulation actually does prevent conduction from loosing energy from the cup.
Conclusion
As you can see from the results on the table and graph (on the previous pages) and also from our evaluation our prediction was correct. We have proved that when you wrap the copper calorimeter with insulators such as wool, it will stop the heat energy from escaping. So when covered with an insulator cover it will keep heat better than without the insulator. The cover stops radiation thereby keeping the water temperature higher than the normal cup.
Investigation:
The Design Of A
Coffee Cup
Final Cup Design
The final cup design involves using the data from the previous experiments and coming up with the best design. This cup would also involve mixing designs from the previous experiments and mixing then all into one design that would keep heat as high and constant as possible fro as long as possible.
1- The cup would involve using something to cover it to prevent evaporation which is, as we have proved, a factor of heat loss in a hot drink. We will use the polystyrene covers as we used in the previous experiment as this was proved to prevent heat energy being lost and kept the drink hotter for longer.
2- Another design feature of the cup would be insulation to prevent the cup from loosing heat energy from conduction, which we have proved in previous experiment is a factor of heat loss in a hot drink. We will use as insulation in the form of wool surrounded by a tin.
3-The last feature of design we will use is to prevent radiation into the cup. It is designed to prevent the hot drink loosing energy through radiation. We are going to use a covering of aluminium foil to stop the radiation. It will be wrapped around the tin can.
