What is the effect of particle size of coffee on the cooling curve of water when coffee is used as an insulator?
Independent Variable: surface area of ground coffee
Dependent Variable: Temperature
Independent Variable: surface area of ground coffee
Dependent Variable: Temperature
Method:
1.Set up the apparatus as shown in the image
2.Put 65g of coffee beans in a large beaker 1
3.Put 65g of medium grind coffee in a large beaker 2
4.Put 65g of small grind coffee in a large beaker 3
5.Place smaller beakers inside the large ones
6.Heat 225cm3 of water with a kettle
7.Change the data logger settings to 0.1 every second for 8000 seconds
8.Pour 75cm3 of water in the 3 smaller beakers
9.Connect all 3 temperature probes to the same data logger and press PLAY
10.Repeat steps 6-9 3 times
1.Set up the apparatus as shown in the image
2.Put 65g of coffee beans in a large beaker 1
3.Put 65g of medium grind coffee in a large beaker 2
4.Put 65g of small grind coffee in a large beaker 3
5.Place smaller beakers inside the large ones
6.Heat 225cm3 of water with a kettle
7.Change the data logger settings to 0.1 every second for 8000 seconds
8.Pour 75cm3 of water in the 3 smaller beakers
9.Connect all 3 temperature probes to the same data logger and press PLAY
10.Repeat steps 6-9 3 times
Risk Assessement:
Transferring hot water from kettle to measuirng cylinder to beaker à don’t touch the equipment with water immediately
Transferring hot water from kettle to measuirng cylinder to beaker à don’t touch the equipment with water immediately
Conclusion
Small surface area of coffee: cooled quickly
Evaluation
Do it for less time and measure the time taken for it to reach certain temperature
Small surface area of coffee: cooled quickly
Evaluation
Do it for less time and measure the time taken for it to reach certain temperature